三正辛胺萃淋树脂在线富集流动注射火焰原子吸收法测定痕量金

建立了用三正辛胺萃淋树脂(TOA)在线富集-流动注射火焰原子吸收法测定痕量金的新方法。并对富集时间、进样流速、洗脱时间、洗脱流速 、介质酸度、洗脱液的浓度及酸度、共存离子等对实验的影响因素进行了研究。实验表明，富集倍率为24倍，检测限为1.3 μg ·L-1。用本法测定电镀废液中的痕量金，结果满意。

Determination of Trace Gold by Flow Injection On-Line Preconcentration Flame Atomic Absorption Spectrometry with Trioctylamine Levextrel Resin

A new method for the determination of trace amount of gold by flow injection on-line preconcentration and flame atomic absorption spectrometry with trioctylamine levextrel resin was developed. The experimental condition of Au(III) on the resin, such as the time of preconcentration, the flow rate, the elutropic time, the elutropic rate, the acidity of medium, the concentration and acidity of eluting agent was studied in this paper. The detection limit is 1.3 microg x L(-1). The enhancement factor of 24 was achieved for a loading period of 90 seconds. The recoveries of Au were 98.0%-102.0%. The developed method has been applied to the determination of trace amount of gold in water samples with satisfactory results.