E. coli in Drinking and Surface Water PT - Quantitative is produced in accordance with ISO/IEC 17043:2010. This sample is manufactured 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. 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 Supply (WS)
Matrix: Water Supply/Drinking water
Analyte/s: Values of analytes vary lot to lot.
All information regarding the use of E. coli in Drinking and Surface Water PT - Quantitative proficiency testing standard can be found in the reporting packet which will be available to download at PT Portal.
E. coli in Drinking and Surface Water PT - Quantitative proficiency testing material is designed for the quantitative determination of E. coli in drinking water 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
Set contains 2 sterile screw cap vials each containing a Vitroid™ (a small disk containing the possible organisms) and 2 - 99mL bottles of phosphate buffer. (Please note, buffer solution may not be provided with your sample. If this causes any concern, please contact PT Service email@example.com.)
This PT sample is designed for the quantitative analysis of total and/or fecal coliform.
The PT sample is provided in duplicate as a stable dehydrated disc requiring hydration. The additional sample is provided for mishaps in the lab. TNI prohibits the practice of multiple tests on a PT sample unless it is normal laboratory practice and multiple analysis is conducted on normal day to day samples.
This sample requires 100 ml of buffer/ saline solution for hydration fluid (see note below)). The dehydrated disc sample is stable for a time exceeding the study schedule. If you are following IDEXX methods for Quantitray follow the directions provided with the media (suggests using Type 1 DI water) and IDEXX protocol for testing of this product.
The dehydrated sample is stable for a time exceeding the study schedule.
Due to the sensitivity of microorganisms and short holding times after hydration, please read entire instructions prior to preparation.
This sample is a single disc and the possible concentration range is quite broad; it may be necessary to analyze the sample in a dilution series using general phosphate buffer solution.
This sample may be analyzed by any method appropriate for coliforms.
Allow the capped sample vial to equilibrate to room temperature.
Open the sample vial and aseptically transfer the disc to the hydrating fluid. NOTE: The disc is the colored puck within the cryotube. It will either be on top of cotton with opaque desiccant beads below the cotton or free moving in a cryotube that contains a desiccant tablet within the cap. The opaque desiccant beads and desiccant tablet are to keep the container dry and are not biologicals.
Shake well and after 15 minutes shake the sample well. Inspect to assure dissolution of the disc. It should dissolve completely.
This represents the sample for analysis. Further dilutions are recommended to achieve a proper count, but base all counts on the whole volume sample.
Note: We are no longer supplying Phosphate buffer for Micro samples. Please proceed to use your laboratory′s standard buffer or saline solution. If your laboratory does not have buffer in-house, we recommend using P3813, Phosphate Powder which can be purchased at SigmaAldrich.com.
Storage and Stability
Please refer to the sample label for storage conditions.
Are you new to Supelco® Proficiency TestingͰ 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 firstname.lastname@example.org.
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.
This PT sample is designed for the quantitative analysis of total and/or fecal coliform. The PT sample is provided in duplicate as a stable dehydrated vitroid™ requiring hydration. The additional sample is provided for mishaps in the lab. Store the PT sample at as directed. The dehydrated vitroid sample is stable for a time exceeding the study schedule.
Proficiency Testing Schedule (2022-2023)
Drinking Water WS22-1 January 12 – February 25, 2022 WS22-2 March 23 - May 6, 2022 WS22-3 July 6 - August 19, 2022 WS22-4 September 21 - November 4, 2022
WS23-1 January11 – February 24, 2023 WS23-2 March 22 – May 5, 2023 WS23-3 July 5 – August 18, 2023 WS23-4 September 20 – November 3, 2023
Quick-Turn Study (on demand proficiency test that is offereddepending on lot availability)
Supelco is a registered trademark of Merck KGaA, Darmstadt, Germany
Vitroid is a trademark of Sigma-Aldrich Co. LLC
Total coliforms 20.0 - 200 CFU/100mL
Total Coliform, MPN 20.0 - 200 MPN/100 mL
Escherichia coli 20.0 - 200 CFU/100mL
Escherichia coli, MPN 20.0 - 200 MPN/100 mL
Fecal coliforms 20.0 - 200 CFU/100mL
Fecal coliform, MPN 20.0 - 200 MPN/100 mL
Storage Class Code
6.2 - Infectious substances
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).
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