Analytical Products Group, Inc. (APG) is an international provider of proficiency testing and quality assurance services. Proficiency testing programs establish the validity of a method, the competency of a laboratory, and defensibility of data. Since 1982, APG has conducted in excess of 400 studies, and since 1999, APG has evaluated over 1,000,000 data points.

Analytical Products Group Proficiency Testing Program meets all of the following: A2LA accredited, NIST accredited, Det Norske Veritas (DNV) Certificated, US EPA National Standards for Water Proficiency Testing Program Criteria Document (NERL-Ci-0045), Compliant with ISO/REMCO Harmonized Protocol for Proficiency Testing of Analytical Laboratories, ASTM E1301 certificated, CNLA approved provider of proficiency testing schemes (CNLA-PTP013), Approved by the Standards Council of Canada (SCC) and Cerificate of NAEM Membership