测定锗的二极管阵列检测-流动注射分光光度法

Determination of Germanium by Flow Injection-Spectrophotometry with CCD Diode Array Detector

研究了在溴化十六烷基三甲铵（ＣＴＭＡＢ） 存在下， 锗与２，３ ，７ － 三羟基－ ９ － 水杨基荧光酮－ ６（ＳＡＦ） 的显色反应， 采用二极管阵列检测器， 建立了检测微量锗的流动注射分光光度法。 将该法应用于食品和中草药中锗的测定， 取得了满意的结果。 锗在０ ～３ ．０ ｍｇ／Ｌ 范围内线性良好， 检出限为０ ．０１２ ｍｇ／Ｌ， 样品加标回收率为８１ ．０ ％ ～９８ ．５ ％ ， 相对标准偏差小于８ ．４ ％ 。 实验表明， 该法灵敏、快速， 准确度高、精密度好， 操作简便， 易于推广使用。

A method for the micro determination of germanium by flow injection-spectrophotometry with CCD diode array detector is reported, based on the color reaction between germanium and salicyl fluorone in the presence of cetyl trimethyl ammonium bromide. A good linear relationship was obtained in the range of 0～3.0 mg/L for germanium. The method was applied to determine germanium in several samples of food and Chinese medical herbs with satisfactory results. The recoveries of spiked samples were found to be in the range of 81.0%～98.5%, while the relative standard deviation was less than 8.4%. The detection limit is 0.012 mg/L. The method is sensitive, rapid, repeatable and easy in operation.