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Herbicides in Soil - PT

Proficiency Testing Material

Número EC:

Nível de qualidade


pkg of 1 × 50 g






matrix material

temperatura de armazenamento


Descrição geral

Herbicides in Soil - PT proficiency testing material is produced in accordance with ISO/IEC 17043:2010. This product is produced according to TNI requirements. However, please note, this sample may include non-TNI analytes as well. The PT portfolio allows our test components to offer significant performance data to monitor and prove competency to customers, accreditation bodies or both.

Supelco® is a global proficiency testing (PT) provider that manufactures best-in-class environmental and pharmaceutical PT products. We are the world leader in the manufacturing of real-world soil, sediment and sewage sludge PT products.

Type of PT Scheme:
Solids/Soils/Hazardous Waste

Matrix: Soil

Analyte/s: Values of analytes vary lot to lot.

All information regarding the use of Herbicides in Soil - PT can be found in the reporting packet which will be available to download at PT Portal.


Herbicides in Soil - PT is a soil/hazardous waste proficiency testing material, suitable for testing herbicides in soil samples. Our soil PT samples behave as real samples; and, unless there is no alternative, are not simply spikes added to a blank soil. They are designed to meet the requirements of national, regional and state-specific accreditation bodies (TNI, USEPA, UKAS) for quality assurance and continuous improvement.

Have any questions? Explore our FAQs.
For more information on this product, please contact our PT Service Team.


50 g

Características e benefícios

We have a vast portfolio of environmental PT schemes with "fit-for-purpose" samples to help you meet the needs of the laboratory.

Our proficiency testing (PT) program is a benchmark to:

  • provide staff with an insight into their laboratory′s performance, to verify the accuracy and reliability of their testing process
  • provide a comparison of performance with that of other laboratories, nationally and internationally
  • test and educate staff, provide a better understanding of the impact of incorrect results and identify areas where there may be problems
  • provide an independent evaluation of laboratory performance
  • demonstrate to clients, colleagues and accreditation bodies that there is a commitment to quality

Nota de preparo


  • The PT sample size provided is 50 g of soil.
  • The soil has been chemically stabilized to minimize the degradation of the sample.
  • The PT sample has been sized to 100 mesh.
  • The required storage condition is 4 ºC.
  • The evaluation of results will be based on study statistics as required by TNI.
  • The sample has been intentionally prepared with an apparent headspace.

Sample Preparation

  • Mix prior to use.
  • Recommended minimum sampling size is 10 g.
  • Extract as defined in SW846, Extraction Method 3540B, 3541, 3550A or similar method.

Note: Sample extracts and calibration solutions should be in the same solvent.

  • Determine the percent moisture content of the sample and report results on a dry weight basis.
  • Report all results on a dry weight basis.
  • Analyze the extract using the appropriate method for which you are seeking accreditation.
  • Determine the concentration of the analytes listed, and report your results report your results in the PT Portal.
  • The method used must be reported.

Armazenamento e estabilidade

Please refer to sample label for expiration date, specific storage temperature, and specific storage conditions.

Outras notas

Are you new to Supelco® Proficiency Testing? Be sure to register your account details in the PT Portal before placing your order.
This will provide access to data entry, reporting packets and final reports. Registrations will be approved shortly after your order is placed. For further questions, write to us at

When placing your order online, please indicate your study preference under the ′your reference′ column. Available studies can be viewed at the bottom of the page.
Click here to learn more about Quick-Turn Studies (on-demand proficiency tests that are offered depending on lot availability). The Quick-Turn results are released within 48-72 hours whereas scheduled study reports are released within 21 days.

Proficiency testing samples are presented as single blind. No values for the samples are released until the testing period concludes.

Proficiency Testing Schedule (2022-2023)

LPTP22-S2 April 6 - May 20, 2022

LPTP23-S2 April 5 – May 19, 2023

Quick-Turn Study (on demand proficiency test that is offered dependingon lot availability)

Informações legais

Supelco is a registered trademark of Merck KGaA, Darmstadt, Germany



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Código de classe de armazenamento

13 - Non Combustible Solids



Ponto de fulgor (ºF)

Not applicable

Ponto de fulgor (ºC)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service