Description General description 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. Preparation Note This ampule contains a concentrate of a No. 2 Diesel in methanol. This PT sample is packaged as a 1.5 mL concentrate. The solvent for this sample is methanol. The PT sample is not preserved. Sample preparation To prepare solution, fill a 1000-mL volumetric flask to volume with carbon-filtered reagent-grade water at room temperature. Open ampule PE1708-2ML (be careful to avoid cuts on glass) and immediately withdraw 1 mL. Quickly inject the 1 mL aliquot into the reagent water in the expanded area of the volumetric flask. Mix the sample by inverting the flask three times only and analyze immediately. Note: This sample may be used for method AK102 SV (small volume). To ensure sample integrity, we recommend preparing the same small volume as you normally test. For instance, if your small volume sample is 125 mL, the PT should be diluted 125 uL of concentrate to 125 mL of water (1:1000 dilution). Other Notes Proficiency testing samples are presented as single blind. No values for the samples are released unti the testing period concludes. Values of analytes vary lot to lot. Proficiency Testing Schedule (2020-2021) Wastewater WP20-1 January 15 - February 28, 2020 WP20-2 March 25 - May 8, 2020 WP20-3A May 13 - June 26, 2020 WP20-3B July 8 - August 21, 2020 WP20-4 September 23 - November 6, 2020 WP20-5 November 25 - January 8, 2021 WP21-1 January 13 - February 26, 2021 WP21-2 March 24 - May 7, 2021 WP21-3 July 7 - August 20, 2021 WP21-4 September 22 - November 5, 2021 Quick-Turn Study - (non-scheduled proficiency test that is available at any time)