火焰原子吸收分光光度法测定原油中的铁和镍  

Determination of ion and nickel in crude oil by flame atomic absorption spectrophotometry

作　　者：鞠美庭[1] 冯蕾[2] 李侃[2] 

机构地区：[1]石油大学炼制系,东营257062 [2]石油化工科学研究院

出　　处：《分析仪器》1998年第4期36-39,共4页Analytical Instrumentation

摘　　要：探讨了以有机溶剂将原油溶解后直接用火焰原子吸收分光光度法测定铁镍的方法。针对原油组成复杂，共存物分子吸收和光散射对待测元素严重的背景吸收干扰，使用了塞曼效应和氘灯两种扣除背景的方法，并与干式灰化预处理方法进行了比较。用塞曼效应扣背景，Fe、Ni平均加标回收率分别为105％和98．1％，测定的变异系数分别为5．7％和10％；用氘灯扣背景，Fe、Ni平均加标回收率分别为83．4％和82．0％，测定的变异系数分别为13％和9．1％。A method for determining Fe and Ni in crude oil by flame atomic absorption spectrophotometry has been investigated with samples being dissoved in organic solvents (cyclohexanone, isopropyl alcohol, cyclohexane, etc). In view of the complexity fo crude oil and the serious background interference of coexistant molecules, two background correction methods (Zeeman effect and deuterium lamp methods) were used experimentally. For Zeeman effect method, the average recoveries of Fe and Ni are 105% and 98. 1 % with RSD being 5.7% and 10%, respectively, and for deuterium lamp method, the average recoveries are 83.4% and 82.0% with RSD being 13% and 9. 1%, respectively.

关 键 词：原油 铁 镍 原子吸收 分光光度法 

分 类 号：TE622.14[石油与天然气工程—油气加工工程]