氧弹燃烧-离子色谱法测定原油中氯和溴  

IC Determination of Chlorine and Bromine in Crude Oil with Sample Treatment by Combustion with Oxygen Bomb

作　　者：任飞[1] 邬蓓蕾[1] 叶佳楣[1] 林振兴[1] 奚中威[1] 陈铁杉[1] 

机构地区：[1]宁波出入境检验检疫局,宁波315012

出　　处：《理化检验（化学分册）》2012年第11期1350-1352,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：进口原油有害元素普查及相关快速检测方法研究(2006IK057)

摘　　要：采用氧弹燃烧法对原油样品进行燃烧,然后用碳酸钠-碳酸氢钠溶液作为吸收液进行吸收,并提出了离子色谱法分离测定原油中氯和溴的含量的方法。以Dionex IonPac AS23型分离柱为离子交换柱,以4.8mmol·L-1碳酸钠-1.0mmol·L-1碳酸氢钠溶液为淋洗液等度洗脱。氯和溴的质量浓度均在0.01～1mg·L-1范围内与其峰面积呈线性关系,方法的检出限(3S/N)分别为0.3mg·kg-1与0.7 mg·kg-1。方法用于原油样品分析,测定值的相对标准偏差(n=6)在3.5%～4.2%之间,回收率在91.8%～109%之间。The sample of crude oil was combusted in oxygen bomb and the chlorine and bromine were absorbed in Na2CO3-NaHCO3 solution. The contents of chlorine and bromine in the solution were determined by IC. The Dionex IonPac AS23 column was used as ion exchange column, and a mixture of 4.8 mmol ·L-1 Na2CO3 and 1.0 mmol. L -1 NaHCO3 was used as eluent. I.inear relationships between values of peak area and mass concentration of chlorine and bromine were obtained in the same range of 0.01-1 mg - L-1, and values of detection limit （3S/N） found were 0.3 mg· kg-1 for chlorine and 0. 7 mg · kg-1 for bromine. The proposed method was applied to the analysis of sample of crude oil, giving values of RSD＇s （n=6） and recovery in the ranges of 3.5%-4. 2% and 91.8%-109%respectively.

关 键 词：氧弹燃烧 离子色谱法 原油 氯 溴 

分 类 号：O657.7[理学—分析化学]