【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。更多还原

【Abstract】 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.Linear 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.更多还原