TY - JOUR AU - David Duewer AU - Jeanice Brown AU - Katherine Sharpless AU - S Margolis C2 - Analytical and Bioanalytical Chemistry DA - 2020-11-11 DO - https://doi.org/10.1007/s00216-020-03021-9 LA - en PB - Analytical and Bioanalytical Chemistry PY - 2020 TI - Lessons From the NIST Micronutrients Quality Assurance Program for Vitamin C, 1993 to 2015: Sample Stability, Assay Reproducibility, and Use of Controls to Improve Comparability ER -