柱切换离子色谱法测定原油中盐含量

›› 2018, Vol. 49 ›› Issue (7): 90-94.

柱切换离子色谱法测定原油中盐含量

范艳璇,何沛

中国石化石油化工科学研究院

收稿日期:2017-12-07 修回日期:2018-01-12 出版日期:2018-07-12 发布日期:2018-07-26
通讯作者: 范艳璇 E-mail:fanyanxuan.ripp@sinopec.com

DETERMINATION OF SALT CONTENT IN CRUDE OIL BY COLUMN-SWITCHING ION CHROMATOGRAPHY

,HE PEI

Received:2017-12-07 Revised:2018-01-12 Online:2018-07-12 Published:2018-07-26

摘要/Abstract

摘要： 建立了用离子色谱方法快速批量测定原油中盐含量的方法，通过手动高频震荡萃取后，利用柱切换技术在线消除萃取液中乙醇对离子色谱系统的干扰，然后经过离子色谱柱对无机氯化物进行分离分析，在优化的色谱条件下，盐质量浓度在0.1 ~ 100 mgNaCl/L范围内线性相关系数均大于0.999，离子色谱检出限为0.01 mgNaCl/L（信噪比为3）。该方法与现行标准方法电量法之间的差异不显著，可满足原油中盐含量的分析要求。

关键词: 离子色谱法, 柱切换, 盐含量, 原油

Abstract: A fast determination method for salt content in crude oil by ion chromatography was developed. The samples were extracted by high frequency oscillation extraction using mixture of water, ethanol, and xylene. The column-switching technique was then used on line to eliminate the interference of ethanol in extraction solution in chromatography analysis. Then the chloride was detected by ion chromatography. The results show a great linear relationship in the concentration range from 0.1 to 100 mgNaCl/L, the correlation coefficient is greater than 0.999. The detection limit for ion chromatography is 0.01 mgNaCl/L based on S/N of 3. The difference between this method and the coulometry method is not significant. The column-switching ion chromatography can meet the analysis requirement of salt content in crude oil but much fast and simple.

Key words: ion chromatography, column-switching, salt content, crude oil

范艳璇何沛. 柱切换离子色谱法测定原油中盐含量[J]. , 2018, 49(7): 90-94.

HE PEI. DETERMINATION OF SALT CONTENT IN CRUDE OIL BY COLUMN-SWITCHING ION CHROMATOGRAPHY[J]. , 2018, 49(7): 90-94.

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