Baseline assessment of 25-hydroxyvitamin d reference material and proficiency testing/external quality assurance material commutability: A Vitamin D Standardization Program Study
Wise, Stephen A.; Phinney, K; Tai, Susan S.-C.; Camara, Johanna E.; Myers, Gary L.; Durazo-Arvizu, Ramon; Tian, Lu; Hoofnagle, Andrew N.; Bachmann, Lorin M.; Young, Ian S.; Pettit, Juanita; Caldwell, Grahame; Liu, Andrew; Lucas, Robyn
The Vitamin D Standardization Program (VDSP) coordinated an interlaboratory study to assess the comparability of measurements of total 25-hydroxyvitamin D [25(OH)D] in human serum, which is the primary marker of vitamin D status. A set of 50 individual donor samples were analyzed by 15 different laboratories representing national nutrition surveys, assay manufacturers, and clinical and/or research laboratories to provide results for total 25(OH)D using both immunoassays (IAs) and LC tandem MS...[Show more]
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|Source:||AOAC International Journal|
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