偏二甲肼的离子色谱分析检测

PDF全文下载：20160100023

孙素莉，程媛，赵文英，武智强，范志先

 （青岛科技大学 化工学院，山东 青岛 266042）

 摘要：采用离子色谱法建立偏二甲肼的定量分析方法，并对样品中偏二甲肼的含量进行测定。以20 mmol·L-1甲烷磺酸溶液为淋洗液，使用CS12A（250 mm×4 mm）阳离子交换柱，电导检测器，外标法定量。测得偏二甲肼的检出限为005 mg·L-1，在25~1 000 mg·L-1浓度范围内，线性回归方程为Y=502 686X+239 795，R=0999 7。40 mg·L-1和400 mg·L-1水平的平均回收率分别为997%和995%，8次样品重复测定的相对标准偏差为110%。结果表明，采用离子色谱测定偏二甲肼的方法快速、准确、可靠。

 关键词： 偏二甲肼；离子色谱；外标法

中图分类号： O 614             文献标志码：A

 Determination of Unsymmtric Dimethyl Hydrazine by Ion Chromatography

 SUN Suli, CHENG Yuan, ZHAO Wenying, WU Zhiqiang, FAN Zhixian

 (College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

 Abstract: Ion chromatograph was adopted to construct the quantitative analysis methods of the unsymmtric dimethyl hydrazine, to determine the content of the sample. In this method, 20 mmol·L-1 methane sulfonic acid solution was used as the eluent, CS12A(250 mm×4 mm) cation exchange column and a conductivity detector were employed to separate and detect the ions, with external standard method for quantification purpose. The LOD of UDMH was analyzed as 0.05 mg·L-1. Among the concentration range of 25—1 000 mg·L-1, the regression equation of the standard curve was Y=502 686X+239 795，R=0.999 7. The average recoveries under the addition level of 40 mg·L-1 and 400 mg·L-1 were 99.7 % and 99.5 % respectively. The RSD of 8 parallel samples was 1.10 %. Results show that it is a rapid, accurate and reliable method to determine unsymmetric dimethyl hydrazine by ion chromatography.

Key words: unsymmetric dimethyl hydrazine (UDMH); ion chromatography (IC); external sandard method

 收稿日期： 20141117

作者简介： 孙素莉(1970—)，女，实验师.

文章编号： 16726987（2016）01002303； DOI： 10.16351/j.16726987.2016.01.005