本文用氨基酸分析仪测定含乳饮料中游离甘氨酸含量，研究了样品预处理方法和仪器色谱分离条件。测得含乳饮料中游离甘氨酸的含量，从而对含乳饮料中是否添加甘氨酸进行分析，此方法具有较好的重现性，添加标准的回收率为98.8%~101.7%，方法精密度为0.53%。

The amino acid analysis direct system was used to test the free-glycin in dairy drinks, and the methods for sample pretreatment and chromatographic parameters were studied in this paper. The test results were to analysis whether the dairy drinks had free-glycin added. The method is convenient, accurate and practical, the recovery rate was 98.8%~101.7%, RSD was 0.53%.