正三辛胺萃取-分光光度法测定原油中的痕量铅

Determination of trace lead in crude oils by trioctylamine extraction-spectrophotometry

以正三辛胺萃取分离干扰离子 ,采用 Pb( ) -水杨基荧光酮 -溴化十六烷基三甲铵显色体系测定原油中的痕量铅。考查了正三辛胺萃取分离干扰离子的条件和测定条件。表观摩尔吸光系数为 1 .2 5× 1 0 5L· mol- 1· cm- 1 ,合成样品回收率 1 0 0 .7% ,原油分析结果的相对标准偏差小于 3.3%。

Trioctylamine was used to extract and separate interfering ions. The Pb(Ⅱ) salicylfluorone cetyltri methylammonium bromide coloured system was used to determine trace lead in crude oils.The measuring and extraction conditions were studied.The apparent molar absorptivity is 1.2×10 5 L·mol -1 ·cm -1 .The extraction recovery of synthetic sample is 100.7% and the relative standard deviation of analytical results is less than 3.3%.