This test is designed to test forensic examiners that perform quantitative chemical analyses of methamphetamine. Participants will be asked to report the results of quantitative analysis, as well as measurement uncertainty. Laboratory performance will be assessed by z-score and En-score using statistical methods described in ISO 13528:2005(E). Subscription deadline for this test is February 1, 2014. This test is approved to meet ASCLD/LAB external proficiency test requirement in the drug chemistry discipline.