All Photos(1)



Gelöster Sauerstoff - WP

Proficiency Testing Material

NPW - Dissolved Oxygen




ampule of 2 × 2 mL


in water




matrix material

versandt in

wet ice



Allgemeine Beschreibung

Dissolved Oxygen - Water Pollution (WP) proficiency testing material is produced in accordance with ISO/IEC 17043:2010. 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. The wastewater proficiency test samples are a replica of those which are used to test for potential environmental contamination, thereby covering a broad range of determinants.

Dissolved oxygen in water is an important indicator of water quality. This method helps maintain accurate testing arrangements within the detection/quantification of dissolved oxygen and makes it certain, that the water analysis measures are undertaken. Our high-quality testing measures always help ensure our testing ability for dissolved oxygen and dissolved oxygen by the Winkler method.
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

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

All information regarding the use of NPW - Dissolved Oxygen Proficiency Testing standard can be found in the reporting packet which will be available to download at PT Portal


Dissolved Oxygen - Water Pollution (WP) is suitable for Dissolved Oxygen level testing in water pollution/wastewater samples.

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

Leistungsmerkmale und Vorteile

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

Angaben zur Herstellung


  • This PT sample is packaged as a 2 mL concentrate.
  • The solvent for this sample is water.
  • Store at room temperature.
  • Analyte concentration range is 1 - 100 mg/L.

Sample Preparation

  • This ampule contains a concentrate for the preparation of a solution that can be analyzed for dissolved oxygen.
  • Because of the unique preparation, it is not necessary to shake the ampule before opening it.
  • Partially fill a 1000 mL volumetric flask with reagent-grade water (near 20 °C).
  • Open ampule PE1077-2ML (be careful to avoid cuts on glass) and transfer 1.0 mL of concentrate to the volumetric flask.
  • Fill the volumetric flask to volume with reagent-grade water and mix well.
  • The sample is now ready for immediate analysis.
  • The analysis must be started immediately after sample preparation.

Lagerung und Haltbarkeit

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

Sonstige Hinweise

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 testingt period concludes. Values of analytes vary lot to lot.

Proficiency Testing Schedule (2022-2023)

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

WP23-2 March 22 – May 5, 2023
WP23-4 September 20 – November 3, 2023

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

Rechtliche Hinweise

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



    Oxygen, dissolved 1-100 mg/L
    Oxygen, dissolved (Winkler) 1-100 mg/L







Eye Dam. 1


5.1B - Oxidizing hazardous materials



Flammpunkt F

Not applicable

Flammpunkt C

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