1. Official method 982.23, Vitamin D in mixed feeds, premixes, and pet food - Liquid chromatographic method;AOAC,1983
2. Official method 2002.05, Cholecalciferol (vitamin D3) in selected foods. Liquid chromatography;AOAC,2012
3. Official method 2011.12, Vitamins D2 and D3 in infant formula and adult nutritionals: Ultra pressure liquid chromatography with mass spectrometry detection (UPLC-MS/MS). In Official Methods of Analysis;AOAC,2012
4. Official method 934.01;AOAC,2019
5. Comparison of analysis of vitamin D3 in foods using ultraviolet and mass spectrometric detection;Byrdwell;Journal of Agricultural and Food Chemistry,2009