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NIST/NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results: Winter 2015 Comparability Study (Exercise 10)

Published

Author(s)

Mary Bedner

Abstract

The National Institute of Standards and Technology (NIST) has established a Vitamin D Metabolites Quality Assurance Program (VitDQAP) in collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements. Participants in the tenth exercise of this program, the Winter 2015 Comparability Study, were asked to use the methodology of their choice to measure concentrations of 25-hydroxyvitamin D in pooled human serum control and study materials distributed by NIST. The study materials consisted of Standard Reference Material (SRM) 972a Vitamin D Metabolites in Frozen Human Serum Level 2 and VitDQAP-III (a material designed for the VitDQAP). SRM 968d Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum Level 1 was provided as a control material. Participants provided their data to NIST, where it was compiled and evaluated for trueness relative to the NIST value and concordance within the participant community. A report of results was provided to all participants of the study, and laboratories were identified by code numbers known only to them. The results from this tenth study are reported along with a summary of the analytical methods used.
Citation
NIST Interagency/Internal Report (NISTIR) - 8142
Report Number
8142

Keywords

vitamin D, 25-hydroxyvitamin D, immunoassay, mass spectrometry, liquid chromatography, proficiency

Citation

Bedner, M. (2016), NIST/NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results: Winter 2015 Comparability Study (Exercise 10), NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.8142 (Accessed May 21, 2024)

Issues

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Created September 19, 2016, Updated November 10, 2018