Organophosphorus Pesticides - PT

This proficiency testing sample is produced in accordance with ISO/IEC 17043:2010. All information regarding the use of this material can be found in the reporting packet supplied for each sample.

Randomly contains a minimum 80% of the analytes listed.

NOTE: The concentration ranges have changed to meet NELAC and method requirements.
The PT sample size provided is 50 g of soil. The soil has been sterilized to minimize degradation of the sample. The PT sample has been sized to 100 mesh.
Required storage condition is 4º C.
The evaluation of results will be based on study statistics as required by NELAC.
The sample has been intentionally prepared with an apparent headspace.

Sample Preparation
Mix well prior to use.
Analyze the sample using the preparatory and determinative method(s) for which you are seeking accreditation.
If you are accrediting for more than one method make additional copies of the report form and clearly indicate the method used for the data being reported.
Determine the concentration and report your results on the analysis data sheet provided. Determine moisture content and report on a dry weight basis.

Proficiency testing sampes are presented as single blind. No values for the samples are released until the testing period concludes. Values of analytes vary lot to lot.

Proficiency Testing Schedule (2019-2020)

Soils
LPTP19-S1January 30 - March 15, 2019
LPTP19-S2April 10 - May 24, 2019
LPTP19-S3 July 24 - September 6, 2019
LPTP19-S4 October 9 - November 22, 2019

LPTP20-S1January 29 - March 13, 2020
LPTP20-S2April 8 - May 22, 2020
LPTP20-S3 July 22 - September 4, 2020
LPTP20-S4 October 7 - November 20, 2020

Quick-Turn Study - (non-scheduled proficiency test that is available at any time)