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Herbicides - WP

Proficiency Testing Material, Concentrate for dilution to 1L

WP - Herbicides

Quality Level


ampule of 2 × 2 mL


in tert-butyl methyl ether




matrix material

storage temp.


General description

Herbicides - Water Pollution (WP) proficiency testing material is produced in accordance with ISO/IEC 17043:2010. Also referred to as non-Potable water or Water Pollution sample, this product is produced according to TNI requirements. However, please note, this sample may include non-TNI analytes as well. The higher criteria from the TNI tables mimic the levels common to wastewater samples. 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. Most water PT samples are available as concentrates or ready-to-use volumes giving the end-user flexibility in selecting samples that will fit their exact needs.
These samples are typically provided in duplicate for use in case of lab mishap, for QC purposes or to analyze multiple methods.

Type of PT Scheme: Water Analysis - Water Pollution (WP)

Matrix: Water Pollution/Wastewater

Analytes: Values of analytes vary lot to lot.

All information regarding the use of Herbicides - Water Pollution (WP) can be found in the reporting packet which will be available to download at PT Portal.


Herbicides - Water Pollution (WP) is a Proficiency Testing Material used for testing pesticide analytes in Water Pollution/Wastewater samples.

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

Features and Benefits

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

Preparation Note


  • This PT sample is packaged as a 1.5 mL concentrate.
  • The solvent for this sample is MTBE.
  • All analytes are present in their free acid form.
  • The PT sample is not preserved.

Sample Preparation

  • To prepare solution, partially fill a 1000 mL volumetric flask with reagent grade water.
  • Open ampule PE1124-2ML and transfer exactly 1.0 mL to the volumetric flask.
  • Fill the flask to volume and mix well.
  • This represents the sample ready for analysis.

Storage and Stability

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

Other Notes

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 unti the testing period concludes.
Proficiency Testing Schedule (2021-2022)

WP21-2March 24 - May 7, 2021
WP21-4September 22 - November 5, 2021

WP22-2March 23 - May 6, 2022
WP22-4September 21 - November 4, 2022

Legal Information

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



    2,4,5-T 2-10 μg/L
    2,4-D Total 2-10 μg/L
    2,4-DB 5-10 μg/L
    3,5-Dichlorobenzoic acid 2-10 μg/L
    5-Hydroxydicamba 0.00 - 10.0 ug/L
    Acifluorfen 2-10 μg/L
    Bentazon 2-10 μg/L
    Dalapon 2-15 μg/L
    Dicamba 2-10 μg/L
    Dichloroprop 2-10 μg/L
    Dinoseb (2-sec-butyl-4,6-dinitrophenol, DNBP) 2-10 μg/L
    MCPP 2-15 μg/L
    Pentachlorophenol 2-10 μg/L
    Picloram 2-10 μg/L
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Signal Word


Hazard Statements

Hazard Classifications

Flam. Liq. 2 - Skin Irrit. 2

Storage Class Code

3 - Flammable liquids



Flash Point(F)

-27.4 °F - closed cup - Solvent

Flash Point(C)

-33 °C - closed cup - Solvent

Regulatory Information


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.

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