摘要
目的：探讨铬天青S作显色剂利用分光光度法测定油条中铝的含量。方法：在pH6．7～7．0近中性的体系中，铝在聚乙二醇辛基苯醚（OP）和溴代十六烷吡啶的存在下与铬天青S形成稳定的蓝色四元混合胶束，其吸光度与铝含量在一定浓度范围内成正比。结果：铝含量在0．5～8．0μg／25ml呈良好的线性关系，相关系数r=0．9996，回收率在90％～110％之间。结论：该方法操作简单，显色灵敏、稳定，可用于油条中铝的测定。
Objective：To discuss an analytical method for the determination of aluminium in fried bread stick by chrome azurol S spectrophotometry. Methods：In the near neutral solution （ pH = 6.7 -7.0 ） of polyethlene glycol mono - （P） octyl phengl ether （OP）, aluminium combined with chrome azurol S （CAS） and hexadecylpyridinium bromide into a stable blue quaternion -association, the absorbance was directly proportional to the concentration of aluminium in the solution. Results： Calibration curves were linear within the range of 0. 5 -8.0 μg/25 ml with a correlation coefficient r =0. 9996 and the recoveries were between 90% and 110%. Conclusion：This method is simple, sensitive and stable, and can be used to determine aluminium in fried bread stick.
出处
《中国卫生检验杂志》
CAS
2007年第2期268-269,共2页
Chinese Journal of Health Laboratory Technology
关键词
铬天青S
分光光度法
油条
铝
Chrome azurol S
Spectrophotometry
Fried bread stick
Aluminium
