Laboratory Technologies

Soil & Plant Extract Analysis

 Soil & Plant Extract Analysis

Automated soil and plant extract analysis around the globe is trusted to the SEAL Analytical chemistry analyzers. The choice of the best analyser for soil analysis  and plant extract analysis will depend on your available space, the types of  samples to  be analysed and your throughput requirements. The use of an AutoAnalyser for soil and plant extract analysis can also include automatic sample preparation, with built-in dialysers automatically removing interference from coloured samples, humic acids, proteins and carbohydrates. SEAL Analytical options for soil analysis include AA3 AutoAnalyserQuAAtro, AQ2 and AQ1 Discrete Analysers. Between 40 and 90 soil samples per hour can be calculated and printed automatically. Methods are officially approved and being constantly developed in SEAL laboratories.USEPA, ASTM, ISO, AOAC, DIN, CORESTA regulatory compliant methods.

Specially designed for environmental analysis with features not found in competing analysers (features designed to save you money, lower your detection limits and give you constant results).

Contact us on 02 4735 5054 or email

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

Advantages of SEAL Segmented Flow Analysers for Soil Analysis

  • Officially approved methods
  • Fast accurate and reliable results
  • Low manpower and skill requirement
  • Low reagent consumption, normally less than 1mL per test
  • Several parameters can be measure simultaneously from the same sample

Sample Types

  • Soil extracts prepared by any method
  • Persulfate digests
  • Kjeldahl digests of soil or plants
  • Fertilisers
  • Ashed samples

Multi-Test Methods 

For laboratories with small to medium soil analysis work loads, or even when tests are required infrequently the addition of a multi-test manifold will save time and money. With multi-test methods laboratories can easily measure several different parameters with one analytical cartridge or manifold. When changing from one test to another only the reagents and the colorimeter filter needs to be changed. As an added benefit the multitest methods used for soil analysis incorporate a dialyser. They can also be used without the dialyser for low sample levels which don't require automatic clean-up. The ranges of the multitest methods can also be varied by changing the sample pump tubes.

Contact us on 02 4735 5054 or

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

Segmented Flow Methods for Soil Analysis

  • Aluminium
  • Ammonia
  • Amino acids
  • Boron
  • Calcium
  • Carbohydrate
  • Dissolved Organic Carbon
  • Inorganic Carbon
  • Chloride
  • Fluoride
  • Iodine
  • Magnesium
  • Manganese
  • Nitrate
  • Nitrite
  • Total Nitrogen
  • Phosphate
  • Total phosphorous
  • Potassium
  • Soluble Carbohydrates
  • Potassium
  • Silicate
  • Sodium
  • Sulfate 

Discrete Analyser Methods for Soil Analysis

  • Alkalinity
  • Ammonia
  • Chloride
  • Cyanides
  • Nitrate/ Nitrite
  • Nitrite
  • Phenolics
  • Phosphate, ortho
  • Phosphorous, total
  • Silicate
  • Sulfate
  • Total Kjeldahl Nitrogen

Contact us on 02 4735 5054 or

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AA3 HR - AutoAnalyser

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SEAL Analytical

Based on continuous air-segmented flow analysis principles this AutoAnalyser is specially designed for automated colorimetric determination of dissolved nutrients in environmental samples. With features not found in competing AutoAnalysers you will save money, lower your detection limits and achieve consistent results.

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

SEAL AA3 HR AutoAnalyser

The Seal AA3  HR AutoAnalyser uses  continuous segmented flow analysis principles to provide significant advantages for environmental applications. With reaction times up to 20 minutes, even complex procedures like distillation can be automated. Dialysers can be built into the system for elimination of interference from dirty or colored samples. The proprietary in-line UV digestion procedure conforms to the ISO Standard Methods for automated measurement of Total Cyanide and Total Phosphorus.

The AA3 HR continuous segmented flow analysis principles utilised makes it ideal for all types of water, sea water analysis, soil, plant and fertiliser analysis when high reproducibility and low detection limits are required. It is also the world's most reliable chemistry analyser, with exceptional reproducibility, ultra-low detection limits and robust modular design.

The AA3 HR's clever design features will save you money, time and space. Features such as Multitest Manifolds, extend any single channel analyser into a multi channel analyser and allow you to rapidly  change from one test to another, with only a reagent exchange.

For laboratories with smaller workloads we also have the AA1 AutoAnalyser. See the Downloads tab for more information.

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

SEAL AutoAnalyser Advantages

Thanks to years of consultation with industry leaders, SEAL Analytical has continued to develop the unique features of the AA3 HR AutoAnalyser and continuous segmented flow analysis. This has helped the AA3 HR AutoAnalyser maintain its position as the first choice in fully automated systems for analysing nutrients in soil and water. When choosing an AutoAnalyser it’s worth taking a look at some of the features exclusive to the SEAL's air segmented flow injection analysis, and features designed specifically for environmental applications.

Continuous Segmented Flow Analysis to Reduce Inter-sample Dispersion

  • Not all continuous flow analysers are created equal, the AA3 HR uses air segmented flow analysis  principles, relying on a reaction stream segmented with bubbles of air or nitrogen to reduce inter-sample dispersion. 

Same Wavelength Referencing in Real-time

  • Each channel on the AA3 HR AutoAnalyser has its own high resolution digital photometer, including: its own light source (lamp or LED), wavelength filter, fibre optics, and true dual-beam technology, with same wavelength referencing in real time.

Multi-test analytical chemistry cartridges

  • Allows several different tests to be performed with one manifold, and with only an exchange of reagents.

Fully Automated Modular System

  • With the modular system consisting of a sampler, pump, chemistry test module, photometer and application software, the system or its components can be easily upgraded.

And More..

  • Easily expanded to 8 additional channels
  • Ultra-Low detection limits
  • High resolution (HR) Digital Photometers standard
  • Technologically advanced detection system
  • No adjustment required after lamp or flowcell replacement
  • Multispeed peristaltic pumps
  • Reliable unattended operation
  • Low reagent consumption
  • Ability to add additional samples after run started; Intuitive software operating under Windows.
  • Fully automatic operation- start up to shut down
  • 40-100 samples per hour
  • Over 1000 applications available and under continual development
  • USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods available

For laboratories with smaller workloads we also have the AA1 AutoAnalyser. See the Downloads tab for more information

Contact us on 02 4735 5054 or 0061 2 4735 5054 or

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

Continuous Segmented Flow Analysis Advantages

Wide range:

  • Dilution of sample is rarely necessary
  • High throughput - 3000+ results per day
  • Ultra Low Detection Limits
  • Less than 1ul reagent use per sample


Modular AutoAnalyser Design for high flexibility

  • A One Channel AA3 HR AutoAnalyser comprises a Sampler, Pump, Chemical Manifold, Detector and Computer. This nutrient analyser can easily be extended by adding a second Chemical Manifold and a second Detector. The AA3 HR AutoAnalyser then becomes a two channel system, which measures two different analytes at the same time. Additional Detector and Manifolds can be added, as required, up to a total of 8 channels.

Dual Range Methods

  • Most multitest methods are also dual-range; with separate pump tubes for high and low ranges. You can test an extremely wide range of sample concentrations. For example, the AA3 HR AutoAnalyser method for Nitrate in Seawater can measure up to 8500 ug N/L and has a detection limit of 0.14 ug/L. This same manifold can be used to measure Ammonia and Silicate.

AACE Software for Windows

  • AutoAnalyser Control and Evaluation software for all Continuous Flow Analysers. For large or small systems with high or low workloads: AACE makes daily operation quicker and easier.

Digital Colorimeter

  • High resolution to increase the working range
  • Bubble through the flow cell to increase sampling rate
  • Extended Linear Range due to advanced flowcell design
  • Dual beam operation with same wavelength compensation
  • Ultra low detection limits IE: 0.12 ug/L for Phosphate in Seawater

High Precision Pump

  • Multi-speed motor with High Speed for fast wash out
  • Optional Valves for Reagent Switching or Auto Dilution
  • Software Control and at the pump
  • Built in Leak Detector

Multi-test Manifold

  • Multi-Test Manifolds extend any size analyser to a multiple channel analyser
  • When changing from one test to another only the reagents need to be exchanged.
  • Lowers purchase and maintenance costs as well as space saving
  • Multi-Test Manifolds for:
    • Water & Waste Water nutrient analysis
    • Soil and Plant extracts
    • Seawater
    • Tobacco
    • Feeds
    • Fertilizers
    • Cell Liquors

Chemistry Manifold

  • Holds up to TWO chemistry method manifolds
  • Glass Mixing coils - Chemically inert - clear view of the flow
  • Heating bath with high-precision proportiona control and replaceable coil

XY2 / XY3, XYZ AutoSampler

  • High capacity random access Sampler for large work loads.
  • Up to 180 Samples in cups or tubes in two racksl
  • Separate Rack for Standards

For laboratories with smaller workloads we also have the AA1 AutoAnalyser. See the Download tab for more information.

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

Seal analytical logoSEAL Analytical Limited is a UK based developer of automated wet chemistry using air segmented flow injection analysis and discrete analysers for use in environmental and industrial laboratories.  SEAL has over 25 years experience with automated discrete analysis.  Visit www.seal-analytical.com

In 2002, SEAL formed a wholly owned US subsidiary based in Milwaukee, Wisconsin to promote the sales of wet chemistry discrete analysers in the US and Canada.  Subsequent to this, SEAL's international roll-out continued with distributors being approved in European and Asian Pacific countries.

In 2004, SEAL became the exclusive distributor of Bran+Luebbe Continuous Flow Analysers in the USA, UK and Ireland.

In November 2006, SEAL completed the acquisition of the Bran+Luebbe Continuous Flow Analyser (CFA) and Near InfraRed  (NIR)  Analyser businesses.   This brings together over 50 years of CFA analysis experience of B+L , formally Technicon Industrial Systems, with SEAL's 25 year track record in discrete analysis, allowing SEAL to offer a truly complimentary solution in Automated Chemical Analysis for environmental and industrial laboratories throughout the world.

In August 2008, SEAL joined the Porvair group of companies. Porvair is a specialist filtration and environmental technology group.  This will allow SEAL to continue its dynamic growth  and success worldwide.

Visit SEAL Analytical website: www.seal-analytical.com
 

Contact us on 02 4735 5054

Over 1000 Methods for AutoAnalysers

SEAL has over 1000 methods for the AutoAnalyser & Segmented Flow Analyser, giving you the best reproducibility and the lowest detection limits. SEAL also supplies a wide range of Multi-test Manifolds which allows you to analyse a large number of different parameters with a single channel system.

SEAL AutoAnalyser methods are fully compatible to USEPA, AOAC and ISO standard methods. The list below is a partial list of methods, please contact us if you don't see the application you are interested in.

Link to AutoAnalyser Multi-test methods and detection limits.

  • Alkalinity
  • Alkalinity (methyl orange)
  • Alkaloids, total
  • Ammonia (salicylate)
  • Ammonia (phenate)
  • Boron
  • Bromide
  • Calcium
  • Chloride
  • Chromium (6)
  • Fluoride
  • Hardness
  • Iron
  • Iron, total and free dissolved iron
  • Iodide
  • Magnesium
  • Manganese
  • Nicotine
  • Nitrate
  • Nitrate-Nitrite, Cadmium Column
  • Nitrate-Nitrite, Cadmium Coil
  • Nitrite
  • Nitrogen, total (NH3 NO3 only)
  • Nitrogen, total Kjeldahl
  • Phenol
  • Phosphate
  • Phosphate (molybdovanadate)
  • Phosphorous, total Kjeldahl
  • Potassium
  • Silicate
  • Sodium
  • Sulfide
  • Total Volatile Bases
  • Total Volatile Acidity

 

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

 

Enquire Now

Discrete Analyser AQ2

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SEAL Analytical

A nutrient analyser specifically designed for the environmental market that uses the principle of Discrete Analysis. Allows multiple tests on a single sample; varied tests on a single sample; ultra Low reagent Use and up to 150 tests per hour.

See AQ400 Discrete Analyser for lower detection limits & higher capacity.

See AQ300 Discrete Analyser for smaller throughput  & smaller footprint

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

SEAL AQ2 Discrete Analyser

The Discrete Analyser AQ2  by SEAL Analytical is a nutrient analyser specifically designed for the environmental market that uses the principle of Discrete Analysis. Each test occurs in a separate or discrete reaction vessel. Discrete Analysers allow multiple tests on a single sample; varied tests on a single sample; ultra Low reagent Use and up to 150 tests per hour. The AQ2 Discrete Analyser features: Programmable reaction times; Chemistry that is brought to full completion; 100% Optical Quality Glass Cuvette.

The AQ2  Discrete Analyser employs a robust robotic sampling arm working in conjunction with a stepper motor-driven syringe. The syringe is used for aspirating, dispensing and mixing accurate and precise quantities of sample and reagent into miniaturized test tubes, called reaction wells.

In the AQ2 Discrete Analyser the sample and reagents are incubated in the reaction wells for a pre-programmed time. A single aliquot is then transferred into the Optical Quality Glass Cuvette. The absorbance is read on the reactant in our stationary optical bench to assure the best possible signal to noise ratio.

This nutrient analyser's reaction times are user programmable from seconds to minutes. We have optimised the SEAL AQ2 Discrete Analyser methods to ensure that the chemical reaction is brought to full completion and steady state. This completed reaction exactly emulates both the Manual and the Segmented Flow Methods.

In the AQ2 Discrete Analyser the chemical reaction comes to a full steady state eliminating the problems inherent in the Flow Injection Analysis Methodology. The Flow Injection System does NOT bring the reaction to full completion, decreasing sensitivity and potentially introducing kinetic effects. Once the absorbance is read, the cuvette is thoroughly cleaned, eliminating any carry over or cross contamination.

Watch the video to see the advanced robotics of the AQ2 Discrete Analyser.

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

SEAL Discrete Analyser Advantages

Commonly, laboratory analysers are designed for specific applications and markets, and then as the technology matures alternative applications are uncovered. The Discrete Analyser is no different, being initially designed as a clinical analyser, and later presented to environmental users as a way to reduce costs, increase throughput and reduce waste in laboratories. 

In the early 2000’s SEAL Analytical was formed as the environmental arm of Synermed- a clinical UK based company.  SEAL quickly found obstacles to using clinical analysers in environmental markets, and they subsequently designed a Discrete Analyser to overcome these obstacles. The result is the AQ2 Discrete Analyser- an analyser designed specifically for environmental analysis. Today SEAL has the largest installed base of Discrete Analysers in the USA and they continue to develop the software and hardware for the specific needs of environmental users. 

Key Advantages

  • Walk-away operation
  • Segregated chemical waste and wash minimises environmental impact
  • Only 500 – 600 μL of combined reagents and sample consumed per test
  • Add samples after a run has started
  • Automated standard preparation and two dilutions over over-range samples
  • Lower detection limits
  • Will run up to 150 tests per hour
  • Tests programmable per sample to reduce analysis time
  • Better reproducibility
  • Pre-dilutions can also be scheduled
  • High throughput- with up to 18- tests in a single run
  • Schedule up to 7 tests on a single sample
  • Best value Discrete Analyser on the market

Main clinical analyser design issues addressed by the AQ2

The Mixing of Samples and Reagents- mixing of samples and reagents is critical, however in some analysers it is not very effective, which means the results are not reproducible.   Instead, the AQ2 approximates mixing in a flask by repeatedly “sucking and spitting” samples and reagents, rather than simply stirring. The SEAL approach is the most effective way to mix, and it also limits moving parts.

Cross Contamination- with Discrete Analysers using the same probe to pick up samples and reagents and flicking droplets over the system, the cross contamination of cells is a real possibility.  The AQ2 completely negates cross contamination opportunities by being the only discrete analyser with 3  wash stations, including flushing of the probe (on the outside before it moves anywhere) and a fixed wash pot that is continually filled with fresh DI water. This means the AQ2 is the only Discrete system that can run nitrate & ammonia together with no cross contamination (as nitrate uses NH4CI buffer).

Cuvette Path Length- most Discrete Analysers used in clinical tests use a shorter path length (6 or 7mm), important in clinical tests where reactions are enzymatic, and reagents so expensive (the smaller the cell, the less reagent us used).  These shorter path lengths lower the signal and result in a higher detection limit. The AQ2 includes the accepted and optimum EPA path length of 10mm, which results in lower detection limits, critical for environmental analysis.

Styrene Cuvettes- many Discrete Analysers use styrene reaction wells from which measurement is taken. These are not only more expensive (increasing the cost per test), they scratch easily and are not optically pure, leading to reproducibility issues. The AQ2 uses low cost, disposable reaction wells and measurement is performed in 100% optically pure glass cuvette.

Higher Detection Limits- most Discrete Analysers not designed specifically for environmental applications have higher detection limits resulting from the combination of mixing techniques, shorter path lengths, and non-optical cells. 

Greater Reproducibility- all clinical analysers are direct read. SEAL was aware that flow systems gave the lowest and most reproducible results and ensured this design feature was included in the AQ2. The AQ2’s readings are done in:

  • 100% optically pure glass cuvette (which is not a consumable, and it stays in the detector)
  • With each sample read in exactly the same position, resulting in no alignment issues
  • Inert and easily cleaned glass, with a blank measurement done between each sample
  • A Hellma cuvette, which is exactly the same as those used in spectrophotometers (it is not a flowcell)
  • A static sample, which is then washed out thoroughly, a blank done and then the next sample is put in.

Watch the video below to see the advanced robotics of the AQ2 Discrete Analyser

 

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

The SEAL library of Discrete Analyser methods includes a broad range of analytes important to environmental laboratories. SEAL understands USEPA approved methods are critical for many laboratories and they have invested significantly in this area. SEAL also has individual letters of approval for the SEAL AQ2 environmental methods. These letters state that SEAL methods are acceptable for both waste water (NPDES) and drinking water (NPDWR/NSDWR) compliance monitoring. SEAL is continually developing methods, so please contact us if you don't see your method/ application in the list.

 

Link to AQ2 Discrete Analyser Environmental Methods & Detection Limits.

 Discrete Analyser Methods and Applications include:

  • Alkalinity
  • Ammonia
  • Chloride
  • Chromium, Hexavalent
  • Colour
  • Cyanide
  • Hardness, total
  • Nitrogen, Total Kjeldahl (TKN)
  • Nitrate & Nitrite
  • Nitrite
  • Phenolics
  • Phosphate, Ortho
  • Phosphorous, Total (TP)
  • Phosphorous, Total Kjedahl (TKP)
  • Silica (Reactive Silicate)
  • Sulfate

 Contact us on 02 4735 5054 or  


 

 

 

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

AQ2 Discrete Analyser Features

Glass Cuvette

  • 100% Optical Quality Glass Cuvette used for precise absorbance measurment
  • Robust Detection System utilizes a stationary measurment cell
  • 10 mm optimum path length

Reagent Wedges

  • Reagent wedges with on-board cooling
  • Use only 20ul - 400 ul reagent per test
  • Built in Reagent Level Sensor - verifies reagent volume
  • Reagent expriation date tracked through software

Reaction Wells

  • Low cost, disposable wells used for each discrete reaction
  • Constant heating and programmable reaction time ensure reaction reaches completion

Cadmium Coil

  • Integrated automated cadmium coil reduction for nitrate/nitrite determination
  • In situ coil regeneration is full automated through the software

Flexible Software

  • Highly flexible software - designed with user input
  • QCProTM Data Quality Assurance System
  • User specifies QC types, limits and corrective actions upon QC failure

Watch the video to see the advanced robotics of the AQ2 Discrete Analyser.

 

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

Seal analytical logoSEAL Analytical Limited is a UK based developer of automated wet chemistry discrete analysers for use in environmental and industrial laboratories.  SEAL has over 25 years experience with automated discrete analysis.  Visit www.seal-analytical.com

In 2002, SEAL formed a wholly owned US subsidiary based in Milwaukee, Wisconsin to promote the sales of wet chemistry discrete analysers in the US and Canada.  Subsequent to this, SEAL's international roll-out continued with distributors being approved in European and Asian Pacific countries.

In 2004, SEAL became the exclusive distributor of Bran+Luebbe Continuous Flow Analysers in the USA, UK and Ireland.

In November 2006, SEAL completed the acquisition of the Bran+Luebbe Continuous Flow Analyser (CFA) and Near InfraRed  (NIR)  Analyser businesses.   This brings together over 50 years of CFA analysis experience of B+L , formally Technicon Industrial Systems, with SEAL's 25 year track record in discrete analysis, allowing SEAL to offer a truly complimentary solution in Automated Chemical Analysis for environmental and industrial laboratories throughout the world.

In August 2008, SEAL joined the Porvair group of companies. Porvair is a specialist filtration and environmental technology group.  This will allow SEAL to continue its dynamic growth  and success worldwide.

Visit SEAL Analytical website: www.seal-analytical.com
 

Contact us on 02 4735 5054

Soil samples are normally dried, screened to remove stones and ground before extraction, Many extraction procedures have been developed to provide an estimate of the soil's supply of nutrients available to crops. Some of the most common are dilute acid, calcium chloride, bicarbonate, ammonium acetate and electro-ultrafiltration. Calibration standards are prepared in the sample extraction solution to ensure accurate  results. Methods are available for all common sample preparation procedures. The automated soil methods can easily be adapted for plant and fertiliser analysis.

Enquire Now

Hot Block Digestion System (Automatic)

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SEAL Analytical

The  AIM600/ SEAL Analytical Hot Block Digestion System performs kjeldahl digestion and acid digestions of large numbers of agricultural, soil, plant and food samples under computer controlled conditions.

About the SEAL Analytical Block Digestion System

The SEAL Analytical Block Digestion System (also known as the AIM600) is available as a 50 place unit for 75ml or 100ml digestion tubes  (BD50) or a 28 place unit for 250ml (BD28) digestion tubes.

System comprises:

  • Block digester unit
  • Microprocessor controller
  • Tube rack/draft shield
  • Set of digestion vessels
  • Cooling stand that supports the tube rack above the block. 

The overall unit has been designed for durability and robustness. The block has a stainless steel covering to provide a greater measure of acid resistance. Similarly, the tube rack and cooling stands are also manufactured from the highest quality stainless steel.

 

 Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

Advantages of the SEAL Analytical Block Digestion System

  • Digests large sample numbers under precisely controlled conditions
  • One of the highest sample capacities in the market with the greatest sample throughput.
  • A thick 316 stainless steel covering, providing greater measure of acid resistance.
  • Extremely accurate temperature range (+/-2 Degrees C) due to specially designed heating plates, providing even sample evaporation and more reproducible results
  • Short heat up time, allowing a quicker digestions process and increasing your sample throughput.
  • Programmable controller provides safer digestion, allowing you to increase the temperature by 1 degree C/ minute (no "bumping" of the digests).
  • Store up to 20 different programs of up to 30 steps each.
  • Automatic start, allows your block digestion system to work unattended at night, saving time and increasing lab productivity.
  • Electronics contained in a separate module located outside the fume hood and away from corrosive acid fumes.
  • Cost effective, typically about a quarter of the cost of a microwave digestion system.
  • Unlike microwave systems the BD28s and BD50s  block digestion systems have no ongoing consumable costs.
  • Unique flat plate design tightly regulates temperature ensuring all samples are digested evenly.
  • Safe with no requirement to move samples to more "favourable positions", protecting against bumping and splattering of reactive samples.
  • Sample integrity protected with automatic sensing of power failures, and subsequent holding of the digest to protect samples.

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

Block Digestion System Applications: 

  • TKN (Total Kjeldahl Nitrogen)
  • Total Phosphorous
  • Mercury digestion
  • COD chemical oxygen demand digestion and more

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

Comparison of a Block Digestion System to beakers on a hot plate

The SEAL Analytical Block Digestion System provides better quality results, higher productivity of sample throughput and uses less fume hood space per sample. It's also an automated process and frees the operator to perform other tasks. Digesting samples in a beaker on a hot plate requires constant vigilance and care. A Block Digestor allows you to digest 50 samples simultaneously with minimal operator supervision. All samples on a Block Digestor are processed at exactly the same temperature. Because hot plates have hot and cold spots, all samples are often digested at different temperatures, giving inconsistent/ incorrect results. A Block Digestor regulates the exact digestion time and heating rates, whereas on a hot plate, the times are dependent upon an operator to remember to change the digest conditions.


 

Comparison of Block Digestion Systems to Microwave Digestion System

While microwave digestion systems can accelerate the digestion process, block digestion systems still offer a number of distinct advantages:

Larger runs- the SEAL BD28s and BD50s  block digestion systems digest more samples and larger sample sizes  in one batch. On a microwave digestion system, you are limited to 0.5g for inorganic samples, less for organic samples, the BD28s and BD50s allow you to use ten times this amount.

Less operator involvement- a microwave digestion system requires regular attention by the Operator, disassembling and reassembling digestion vessels. on the BD28s and BD50s, once you add samples and acid, digestion proceeds without intervention by the operator. The high operator involvement for the microwave digestion unit tends to negate the faster digestions.

More flexibility- It is possible to use a wider range of acids including sulphuric acid and perchloric acid on the BD28s and BD50s. On a microwave digestion system, sulphuric acid has too high a boiling point and will melt the PTFE vessels while perchloric acid can be explosive under pressure. It is not possible to perform kjeldahl digestions in a microwave system but you can on the BD28s and BD50s Block Digestion Systems.

Cost-The BD28s and BD50s Block Digestion Systems are much cheaper than microwave digestion systems, typically about a quarter of the cost. Microwave digestion systems also have on-going consumable costs, such as rupture membranes and digestion vessels have finite life. The BD28s and BD50s have no on-going consumable costs.

Contact us on 02 4735 5054 or0061 2 4735 5054 (from NZ) or

Seal analytical logoSEAL Analytical Limited is a UK based developer of automated wet chemistry discrete analysers for use in environmental and industrial laboratories.  SEAL has over 25 years experience with automated discrete analysis.  Visit www.seal-analytical.com

In 2002, SEAL formed a wholly owned US subsidiary based in Milwaukee, Wisconsin to promote the sales of wet chemistry discrete analysers in the US and Canada.  Subsequent to this, SEAL's international roll-out continued with distributors being approved in European and Asian Pacific countries.

In 2004, SEAL became the exclusive distributor of Bran+Luebbe Continuous Flow Analysers in the USA, UK and Ireland.

In November 2006, SEAL completed the acquisition of the Bran+Luebbe Continuous Flow Analyser (CFA) and Near InfraRed  (NIR)  Analyser businesses.   This brings together over 50 years of CFA analysis experience of B+L , formally Technicon Industrial Systems, with SEAL's 25 year track record in discrete analysis, allowing SEAL to offer a truly complimentary solution in Automated Chemical Analysis for environmental and industrial laboratories throughout the world.

In August 2008, SEAL joined the Porvair group of companies. Porvair is a specialist filtration and environmental technology group.  This will allow SEAL to continue its dynamic growth  and success worldwide.

 

Visit SEAL Analytical website: www.seal-analytical.com

 

Contact us on 02 4735 5054

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