GB 5009.309-2025: National food safety standard - Determination of asparagine and glutamine in food

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Scope

This standard specifies the pre-column derivatization-high performance liquid
chromatography and the liquid chromatography-tandem mass spectrometry for the
determination of asparagine and glutamine in food.
In Method I, the direct extraction is suitable for the determination of free asparagine
and free glutamine in special dietary foods, while the enzymatic extraction is suitable
for the determination of total asparagine and total glutamine in special dietary foods.
Method II is applicable to the determination of total asparagine and total glutamine in
special dietary foods.
Method I. Pre-column derivatization-high performance liquid
chromatography

Basic Data

Standard ID	GB 5009.309-2025 (GB5009.309-2025)
Description (Translated English)	National food safety standard - Determination of asparagine and glutamine in food
Sector / Industry	National Standard
Classification of Chinese Standard	X04
Word Count Estimation	13,159
Date of Issue	2025-09-02
Issuing agency(ies)	National Health Commission; State Administration for Market Regulation