摘要
研究了一种汽油中铅的导数分光光度测定方法， 对建立高效、快速、简便、成本低的预处理方法进行了探索， 并研究了测定最佳条件、常见共存离子的干扰以及合理分光体系的选择。用碘－ 正辛醇溶液处理油品， 将烷基铅转化为无机铅化合物， 并用硝酸提取至水相， 以盐酸－ 氯化钠为介质体系， 用导数分光光度法测定铅含量。结果表明该方法适合测定铅含量大于５０ μｇ·Ｌ－ １ 的汽油。
A method of determining of lead in gasoline was studied by derivative spectrophotometry.A series of explorations have been made for developing an excellent,high speed,convenient and low-consumption method.Furthermore,optimum conditions,interference of coexisting ions and rational spectro-system were researched.The alkyl lead in gasoline was transformed into inorganic lead compound by the oxidation of iodine-n-octanol which was extracted into aqueous phase by 1 0 mol·L -1 HNO 3 and determined in the medium of 3 0mol·L -1 -2mol·L -1 NaCl solution by forth derivative spectrophotometry.The results showed the method could be applied to determine lead contents in gasoline which were more than 50μg·L -1 .
出处
《江苏石油化工学院学报》
1999年第3期33-35,共3页
Journal of Jiangsu Institute of Petrochemical Technology
关键词
导数分光光度法
铅
汽油
烷基铅
Derivative spectrophotometry
Lead
Gasoline
Alkyl lead
