Description_x000D_ General description_x000D_ 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._x000D_ Preparation Note_x000D_ Sample preparation_x000D_ The sample consists of one (1) glass sorbent tube that has been spiked with volatile organic compounds._x000D_ The tube is ready for analysis as received._x000D_ The sample tube is shipped sealed in a scew cap container._x000D_ Remove the glass tube from the container and place in your analysis system._x000D_ Analyze using your normal procedures_x000D_ Other Notes_x000D_ Proficiency testing samples are presented as single blind. No values for the samples are released until the testing period concludes. Values of analytes vary lot to lot._x000D_ Proficiency Testing Schedule (2020-2021)_x000D_ Air_x000D_ AIR20-2 April 8 - May 22, 2020_x000D_ AIR20-4 October 7 - November 20, 2020_x000D_ AIR21-2 April 7 - May 21, 2021_x000D_ AIR21-4 October 6 - November 19, 2021_x000D_ Quick-Turn Study Not Available for this Product