Review of Recent Advances in the Use of Proficiency Test Data from Fapas

Introduction:  Proficiency testing (PT) is an essential part of a laboratory’s quality assurance processes, whether or not that laboratory is accredited for the analysis in question. For FSMA, PT programs must meet ISO/IEC laboratory accreditation requirements for critical testing requirements in food, pet food and animal feed. Laboratories will use their PT data in charting their performance over time. However, PT data has uses beyond the immediate needs of the participants.

Purpose:  PT studies can be used to provide method performance data without recourse to costly collaborative trials. This presentation demonstrates the uses of PT data through examples generated from Fapas proficiency testing services. The examples derive from a variety of studies as well as new reference material products in the Fapas portfolio.

Methods:  Data were obtained through proficiency tests accredited to ISO 17043. Data were analysed according to the requirements of the same standard and in keeping with ISO Guide 35.

Results:  Critical method parameters including potential matrix interference were derived from PT data where sufficient method information was captured by the PT provider. The PT data further generated reference values and measurement uncertainty values for reference materials.

Significance:  All of these additional uses of PT data help demonstrate competency to deliver reliable and accurate results to the analytical community and is especially important in the analysis of chemical contaminants or food allergens. Although yet to be promulgated, FSMA Section 202 calls for laboratory accreditation, so PT data, for single and multilaboratory, should be an essential tool to achieve model laboratory standards.