GB 1903.50-2020
NY/T 3879-2021
Determination of 25-Hydroxy Vitamin D, in feeds
WS/T 478-2024
WS/T 478-2015
Operating guidelines for measurement of serum 25-hydroxyvitamin D3—Isotope dilution liquid chromatography tandem mass spectrometry
32003D0741
32002D0165