常见饮料中痕量铝的分光光度法研究  

Spectrophotometric Determination of Trace Aluminum in Common Beverage

作　　者：陈烨璞[1] 蔡汝秀[2] 曾云鹗[2] 高登云[2] 

机构地区：[1]无锡轻工业学院纺织分院,无锡214064 [2]武汉大学化学系

出　　处：《分析化学》1993年第3期319-321,共3页Chinese Journal of Analytical Chemistry

摘　　要：新试剂5-溴水杨基荧光酮可在pH5.5～6.8的六次甲基四胺缓冲溶液中,与铝,溴化十六烷基吡啶形成稳定的红色三元配合物。最大吸收波长约为568nm,摩尔吸光系数高达1.7×10~5L mol^(-1)·cm^1,常见金属离子很少干扰。据此,建立了测定微量铝的方法。其线性范围为0～6μg/25ml回收率在96％～103％之间。本文测定了常见饮茶,饮料及饮水中的微量铝。A steady ternary complex of aluminum was formed with new reagent 2,6,7-trihydroxy-9-(5-bro-mosalicyl )fluorone in the presence of cetyltrimethyl ammonium bromide. The maximum absorbance wavelength of the complex is at 568 nm and its molar absorptivity is 1. 6× 105L. mol-1. cm-1. The suitable condition of the colour reaction and the interferencee of foreign ions have been studied. Beer's law is obeyed over the range of 0-6 μg/25ml. The method can be applied to spectrophotometric determination of trace amounts of Al in tea .beverage and drink water with satisfactory results.

关 键 词：铝 分光光度法 饮料 5-BSAF 

分 类 号：TS27[轻工技术与工程—农产品加工及贮藏工程]