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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%。
The interference ions were extracted by n - trioctylamine extraction and the trace lead in crude oil was determined by Pb () - salicylfluorone - cetyltrimethyl ammonium bromide colorimetric system. The conditions and determination conditions of n-octylamine extraction and extraction of interfering ions were investigated. The apparent molar absorptivity was 1.25 × 105 L · mol-1 · cm-1. The recovery rate of synthetic samples was 100.7%. The relative standard deviation of crude oil analysis was less than 3.3%.