氢化物原子荧光光谱法测定蔬菜罐头中的痕量锡

本文研究了氢化物原子荧光光谱法测定蔬菜罐头食品中的痕量锡最佳检测条件以及样品基体介质、KBH4浓度、酸介质浓度对锡检测结果的影响,并对测定锡时共存离子的干扰和消除进行了探讨,建立了盐酸作为介质,铁氰化钾和草酸作为掩蔽剂的检测方法,本方法的线性范围为1.23～300μg/L,在0～160μg/L范围内,相关系数r=0.9997,检出限为1.23μg/L,相对标准偏差为1.22%～1.85%,回收率为89.6%～105.4%。

Determination of Trace Tin in Vegetable Tin-canned Foods by Generation Atomic Fluorescence Spectrometry

The method for determination of trace tin in vegetable tin-canned foods by hydride generation atomic fluorescence spectrometry was reported. The instrument parameters were optimized. The effects of matrix medium of samples, potassium borohydride and acid medium concentration on the determination results were studied. The interfering and removing of coexistence ions in sample matrix were studied. The determination method, which hydrochloric acid used as the acid medium and potassiumferricyanide and oxalic acid were used as a masking agent was established. In the linear conditions, the linear range of determination is 1.23～300μg/L. Within the range of 0～160μg/L, the related coefficient is 0.997, the limit of detection 1.20μg/L and the relative standard deviations and recoveries are in the range of 1.22%～1.85%, and 91.78%～105.4%, respectively.