NIST Micronutrients Measurement Quality Assurance Program: Spring and Fall 1987 Comparability Studies-Results for Round Robins IX and XI Fat-Soluble Vitamins and Carotenoids in Human Serum
Jeanice M. Brown Thomas, David L. Duewer, Margaret C. Kline, Willie May, Emil Schonberger
From 1984 to 2017, the National Institute of Standards and Technology coordinated the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- soluble vitamins and carotenoids in human serum and plasma. This report describes the design of and results for the Spring and Fall 1987 MMQAP measurement comparability improvement studies: 1) Round Robin IX Fat-Soluble Vitamins and Carotenoids in Human Serum and 2) Round Robin XI Fat-Soluble Vitamins and Carotenoids in Human Serum. The first participant results for Round Robin IX were received April 22, 1987; the last results were received June 23, 1987. The first participant results for Round Robin XI were received July 8, 1987; the last results were received September 4, 1987. The analytes in Round Robin X were selenium and zinc and are not discussed in this report.