GB 5413.20-2022 National Food Safety Standard Determination of Choline in Foods for Infants and Young Children, Milk and Milk Products

GB 5413.20-2022 is applicable to the determination of choline in infant food and fairy products. Compared with GB 5413.20-2013, it deleted the second Farrell's salt spectrophotometry, added ion chromatography as the second method and liquid chromatography of tandem mass spectrometry as the third method.

Contents

1. Scope

2. Principle

3. Reagents and materials

4. Instruments and equipments

5. Analysis steps

6. Formulation of analysis results

7. Precision

8. Others

Appendix A Ion chromatogram of choline standard solution

Appendix B Mass spectrometry scan of choline standard and standard solution and internal standard MRM