色谱

色谱 ›› 2016, Vol. 34 ›› Issue (10): 972-975.DOI: 10.3724/SP.J.1123.2016.06031

• 特别策划:离子态化合物色谱分析专栏 • 上一篇    下一篇

离子色谱法测定空气中的氨、肼和乙醇胺

王真1, 姜振邦2, 李仁勇2   

  1. 1. 武汉大学资源与环境科学学院, 湖北 武汉 430079;
    2. 赛默飞世尔科技, 北京 100102
  • 收稿日期:2016-06-22 出版日期:2016-10-08 发布日期:2013-04-03
  • 通讯作者: 姜振邦

Determination of ammonia, hydrazine and ethanol amine in air by ion chromatography

WANG Zhen1, JIANG Zhenbang2, LI Renyong2   

  1. 1. School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China;
    2. ThermoFisher Scientific, Beijing 100102, China
  • Received:2016-06-22 Online:2016-10-08 Published:2013-04-03

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摘要：

建立了抑制型离子色谱同时检测空气中氨、肼和乙醇胺的分析方法，并应用于评价工作场所空气的安全性。空气中的氨、肼和乙醇胺经甲基磺酸（MSA）水溶液吸收后，用0.22 μm滤膜过滤，除去不溶颗粒。使用新型ThermoFisher IonPac CS19羧酸型阳离子交换分析柱（250 mm×4 mm）和CG19保护柱（50 mm×4 mm），以淋洗液发生器产生的MSA作为流动相，等度洗脱，采用抑制型电导检测器，同时分离和检测铵、肼和乙醇胺。结果表明，铵、肼和乙醇胺的检出限分别为0.003、0.011和0.016 mg/L，RSD为0.98%~1.6%。本方法操作简便，样品无需衍生化等复杂的前处理过程，在15 min内可完成对铵、肼和乙醇胺3种组分的分离测定，有效缩短检测时间，提高工作效率，具有较高的实用价值。

关键词: 氨, 肼, 空气, 离子色谱, 乙醇胺

Abstract:

A method was developed for simultaneous determination of ammonia, hydrazine and ethanol amine in air by suppressed conductivity ion chromatography (IC). The method was applied to evaluate the safety of workplace air. The ammonia, hydrazine and ethanol amine were absorbed with methyl sulfonic acid (MSA) aqueous solution as absorbing solution. The water-insoluble particles were removed by 0.22 μm filter membranes. The separation was performed on ThermoFisher IonPac CS19 carboxylic acid type cation exchange chromatographic column (250 mm×4 mm) and CG19 guard column (50 mm×4 mm). MSA was generated as mobile phase by eluent generator, and isocratically eluted. Suppressed conductance has been selected as the principle for detection of the three compounds simultaneously. The results showed that the precisions of ammonia, hydrazine and ethanol amine were between 0.98% and 1.6%, and the limits of detection (LODs) of ammonium, hydrazine and ethanol amine were 0.003, 0.011 and 0.016 mg/L, respectively. It is a simple, quick and accurate method without any complex pretreatment such as derivatization. The separation of ammonium, hydrazine and ethanol amine can be completed in 15 min. The method can shorten the detection time and improve work efficiency. It has a high practical application value.

Key words: air, ammonia, ethanol amine, hydrazine, ion chromatography (IC)

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