多种前处理方法对明胶空心胶囊中铬元素进行定量分析

目的: 对比不同的前处理方法在明胶空心胶囊中铬元素分析中的优劣,寻找能够提高检测效率的途径。 方法: 采用4种不同的前处理方式即微波消解,部分消解,干法灰化和湿法消解,使用石墨炉原子吸收或火焰原子吸收对7批次明胶空心胶囊中的铬元素定量分析。 结果: 通过不同前处理方法的结果比对,采用部分消解的方式可以将传统检测明胶空心胶囊的时间由4~5 h 减少到0.5 h 左右。 结论: 部分消解的前处理方式可提升空心胶囊重金属检测速度。

Objective: Comparing the characteristics of different pretreatment methods in analysis of chromium in the gelatin vacant capsules,and looking for the special way to improve the detection efficiency. Method: Appling four pretreatment methods to deteriorate the sample,including microwave digestion,part digestion,dry ashing and wet digestion.Use graphite furnace atomic absorption spectrometry(GFAAS) and flame atomic absorption spectrometry(FAAS) to determine Cr content in seven batches of gelatin vacant capsules. Result: Appling part digestion pretreatment and graphite furnace atomic absorption spectrometry can use only about half an hour to complete the analysis of one sample,this method also use less acid solution consumption. Conclusion: Part digestion method will enhance the rapid detection of heavy metals ability of the vacant capsules.

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