Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program VitDQAP written by Mary Bedner and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Institute of Standards and Technology (NIST) established a Vitamin D Metabolites Quality Assurance Program (VitDQAP) in collaboration with the National Institutes of Health Office of Dietary Supplements (NIH-ODS) in 2009. The VitDQAP at NIST administered twelve interlaboratory comparison exercises through 2016 for the measurement of vitamin D metabolites in human serum and plasma. The comparability of participant measurements for target analytes improved substantially over time through the development and promulgation of robust measurement technologies, identification and production of suitable reference materials, isolation and identification of measurement system biases, and support and encouragement of within-laboratory measurement quality control efforts. This VitDQAP Final Report summarizes the program and provides highlights of the twelve exercises conducted during the program's eight-year lifetime.
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results Summer 2015 Comparability Study exercise 11 written by Mary Bedner and published by . This book was released on with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 VitDQAPIII (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.
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results Summer 2015 Comparability Study exercise 11 written by Mary Bedner and published by . This book was released on 2016 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 eleventh exercise of this program, the Summer 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 VitDQAP-I and VitDQAP-II (materials designed for the VitDQAP). Standard Reference Material (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 eleventh study are reported along with a summary of the analytical methods used.
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results Summer 2014 Comparability Study exercise 9 written by Mary Bedner and published by . This book was released on with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 ninth exercise of this program, the Summer 2014 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) 2973 Vitamin D Metabolites in Frozen Human Serum (High Level) and VitDQAP-I (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 ninth study are reported along with a summary of the analytical methods used.
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results Summer 2016 Comparability Study exercise 12 written by Mary Bedner and published by . This book was released on 2017 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 twelfth exercise of this program, the Summer 2016 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 candidate SRM 968f Fat-Soluble Vitamins in Human Serum, Level 1 (SRM 968f L1), and Level 2 (SRM 968f L2). Standard Reference Material (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 twelfth study are reported along with a summary of the analytical methods used.
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results Summer 2014 Comparability Study exercise 9 written by Mary Bedner and published by . This book was released on 2016 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 ninth exercise of this program, the Summer 2014 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) 2973 Vitamin D Metabolites in Frozen Human Serum (High Level) and VitDQAP-I (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 ninth study are reported along with a summary of the analytical methods used.
Download or read book Nistir 7893 written by U.s. Department of Commerce and published by . This book was released on 2014-10-09 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Institute of Standards and Technology (NIST) recently 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 fourth exercise of this program, the Summer 2011 Comparability Study, were asked to use the methodology of their choice to measure concentrations of 25-hydroxyvitamin D in control and study materials distributed by NIST. The study materials consisted of SRM 968e Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum (Level 1, Level 2, and Level 3) and SRM 968d Fat-Soluble Vitamins, Carotenoids and Cholesterol in Human Serum (Level 1). SRM 2972, which is comprised of separate ethanolic calibration solutions with known concentrations of 25(OH)D2 and 25(OH)D3, 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 exercise, and laboratories were identified by code numbers known only to them. The results from this fourth exercise are reported along with a summary of the analytical methods used.
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results written by Katrice A. Lippa and published by . This book was released on 2013 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results written by and published by . This book was released on 2013 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results written by and published by . This book was released on 2012 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results written by Katrice A. Lippa and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NIST NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NIST NIH Vitamin D Metabolics Quality Assurance Program Report of Participant Results written by Mary Bedner and published by . This book was released on 2015 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dietary Supplement Laboratory Quality Assurance Program written by Charles A. Barber and published by . This book was released on 2018 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NIST Dietary Supplement Laboratory Quality Assurance Program (DSQAP) was established in collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS) in 2007 to enable members of the dietary supplement community to improve the accuracy of measurements for demonstration of compliance with various regulations, including the dietary supplement current good manufacturing practices (cGMPs). Exercise N of this program offered the opportunity for laboratories to assess their in-house measurements of nutritional elements (chromium), contaminants (arsenic, cadmium, and lead), water-soluble vitamins (folic acid), fat soluble vitamins (vitamin D2 and vitamin D3), fatty acids, and botanical marker compounds (ginsenosides) in foods and/or botanical dietary supplement ingredients and finished products.
