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标准号 Standard Number：
GB 5009.300-2025
 
标题 Title：
食品安全国家标准 食品中左旋肉碱的测定
National food safety standard  Determination of L-carnitine in foods
 
发布日期 Issued on：2025-03-16
实施日期 Implemented on：2025-09-16
原文语种 Original language：中文 Chinese
翻译语种 Target language：英文 English
 
适用范围：
本标准规定了食品中左旋肉碱的测定方法。
第一法分光光度法适用于婴幼儿食品(不含特殊医学用途婴儿配方食品中的乳蛋白部分水解配方、乳蛋白深度水解配方和氨基酸配方)和乳品中左旋肉碱的测定。
第二法柱前衍生-高效液相色谱法适用于食品(不含特殊医学用途婴儿配方食品和特殊医学用途配方食品)中左旋肉碱的测定。
第三法液相色谱-串联质谱法适用于婴幼儿配方食品和特殊医学用途配方食品中左旋肉碱的测定。
Scope:
This standard specifies the method for determination of L-carnitine in foods.
The Method I Spectrophotometry applies to the determination of L-carnitine in foods for infants and young children (excluding partially hydrolyzed milk protein formulas, extensively hydrolyzed milk protein formulas, and amino acid formulas among formula foods for special medical purposes intended for infants) and milk and milk products.
The Method II Precolumn derivatization-high performance liquid chromatography applies to the determination of L-carnitine in foods (excluding formula foods for special medical purposes intended for infants and formula foods for special medical purposes).
The Method III Liquid chromatography-tandem mass spectrometry applies to the determination of L-carnitine in formula foods for infants and young children and formula foods for special medical purposes.
 
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