Certified Proficiency Testing Samples

Certified Proficiency Testing Samples are homogeneous, stability-tested reference materials with assigned values established through validated analytical procedures and statistical evaluation across participating laboratories. They are used to demonstrate measurement competence, validate analytical methods, and support accreditation requirements under recognized quality frameworks. Compatible with a wide range of techniques including HPLC, GC, GC-MS, ICP-MS, AAS, and wet-chemistry assays, these samples enable objective assessment of accuracy, precision, and bias. Typical users include contract testing laboratories, environmental and food safety labs, pharmaceutical QC units, and industrial analytical departments seeking ongoing verification of instrument and analyst performance.