Reference number
ISO 20635:2018
ISO 20635:2018
© ISO 2025
International Standard
ISO 20635:2018
Infant formula and adult nutritionals — Determination of vitamin C by (ultra) high performance liquid chromatography with ultraviolet detection ((U)HPLC-UV)
Edition 1
2018-07
2018-07
ISO 20635:2018
68604
Published
(Edition 1, 2018)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
This document specifies a method for the determination of vitamin C (L-ascorbic acid) present in all forms of infant and adult formulas (powders, ready-to-feed liquids and liquid concentrates), using (ultra) high performance liquid chromatography with ultraviolet detection (U)HPLC-UV. The application range runs from 2,5 mg/100 g (limit of quantification) to 50 mg/100 g expressed in the product as consumed. The method is able to distinguish between D-ascorbic acid (isoascorbic- or erythorbic acid) and L-ascorbic acid.