离子色谱法测定循环水中胺液  

Determination of amine solvent in circulating water by ion chromatography

作　　者：肖寒 李明哲[1,2] 王化吉 XIAO Han;LI Ming-zhe;WANG Hua-ji(Sinopec Research Institute of Safety Engineering Co.,Ltd.,Qingdao 266100,China;State Key Laboratory of Safety and Control for Chemicals,Qingdao 266100,China)

机构地区：[1]中石化安全工程研究院有限公司,山东青岛266100 [2]化学品安全控制国家重点实验室,山东青岛266100

出　　处：《化学研究与应用》2023年第6期1499-1504,共6页Chemical Research and Application

基　　金：中国石化科技计划项目(318023-12)资助;中国石化重大科技项目(321123)资助。

摘　　要：为解决胺液水冷器微量泄漏难以及时发现的难题,建立了离子色谱法测定循环水中N-甲基二乙醇胺含量的方法。采用SH-CC-4型色谱柱,以甲烷磺酸和18-冠醚-6为淋洗液,N-甲基二乙醇胺质量浓度在(0.08~250)mg·L-1范围内,峰面积与浓度呈良好的二次曲线关系,相关系数为0.9991,检出限(3S/N)为0.08mg·L-1,加标回收率97.3%~104.4%。该方法操作简便、检出限低,具有良好的精密度和准确度,可用于胺法脱硫装置循环水中泄漏胺液的检测。In order to solve the problem that it is difficult to detect trace leakage of amine solvent cooler in time,a method for deter-mination of N-methyl diethanolamine in circulating water by ion chromatography was established.SH-CC-4 column was used with methanesulfonic acid and 18-crown-6 as eluent.The peak area showed a good quadratic curve relationship with the concentration in the range of 0.08 to 250mg·L^(-1).The correlation coefficient was 0.9991,the detection limit(3S/N)was 0.08mg·L^(-1).The values of recovery found were in the range of 97.3%~104.4%.The method is easy to operate.It has low detection limit,good precision and accuracy.It can be used for leakage detection of amine solvent in amine desulfurization unit.

关 键 词：离子色谱法 循环水 N-甲基二乙醇胺 

分 类 号：O657.75[理学—分析化学]