傅立叶变换红外光谱法测定奶粉中三聚氰胺的含量

Quantitative Determination of Melamine of Milk Powder by Infrared Spectroscopy

建立红外光谱法定量测定奶粉中三聚氰胺的方法,为三聚氰胺无损检测提供理论依据。选取1 551 cm-1附近特征吸收峰,建立线性定量模型。红外光谱法测定奶粉中三聚氰胺相关度高达0.999 2,准确度高、稳定性好、检测限低,样品回收率为98.89%。运用红外光谱法测定奶粉中三聚氰胺的含量是可行的。

The aim was to develop a model of quantitative analysis of melamine content of milk powder by infrared spectroscopy and provide theoretical basis for the nondestructive detection of melamine. Linear model was respectively set up by taking an absorption peak of 1 550 cm^-1as characteristic absorption peak. The correlation coefficient of linear model was 0.999 2 and the recovery was 98.89 %. Its advantages include low analytic limitation,high accuracy and excellent stability. It was feasible to determine melamine content of milk powder by using the linear model quantitatively.