摘要
目的建立一种固相萃取净化一连续流动法测定纸质品中六价铬残留量的方法。方法针对样品中的六价铬，用pH为8．0的磷酸二氢钾缓冲溶液振荡萃取30min，经聚酰胺SPE柱净化，然后用连续流动分析仪进行了六价铬的测定。结果文中方法的检出限为0．044mg／kg，回收率在84．0％99．0％之间，相对标准偏差小于8．60％。结论建立的方法具有操作简便、快速、灵敏度高等优点，适用于纸质品中六价铬残留量的快速测定。
The aim of this study was to develop a method for the determination of Cr（VI） residues in paper-made packaging by continuous flow method after solid phase extraction cleanup. Cr（VI） was extracted from the sample by oscillation using the solution of potassium hydrogen phosphate （pH=8.0）, cleaned up by solid phase extraction of polyamide, and then determined by continuous flow method. The detection limit of Cr（VI） in the method was 0.044 mg/kg, the recovery was in the range of 84.0%～99.0%, and the relative standard deviation （RSD） was less than 8.60%. The real sample analysis showed that this simple, fast and accurate method could be used for the determination of the residues of Cr（VI） in paper-made packaging samples.
出处
《包装工程》
CAS
CSCD
北大核心
2016年第1期107-110,163,共5页
Packaging Engineering
关键词
六价铬
固相萃取净化
纸质品
连续流动法
Cr（VI）
solid phase extraction cleanup
paper-made packaging
continuous flow method
