水中乙醛和丙烯醛分析方法的对比

The Comparative Study on Analytical Method of Acetaldehyde and Acrolein in Water

对测定水中乙醛和丙烯醛的3种方法——2,4-二硝基苯肼衍生化法、顶空气相色谱法和吹扫捕集-气相色谱质谱法进行概述和总结,并对各方法的试验条件、方法原理、测定影响因素以及效能验证等分析、比对,突出表现各自的优势和特点。用3种方法同时测定实际水样,结果无显著差异,精密度、准确度满足监测要求。

In this paper three kinds of methods for the determination of acetaldehyde and acrolein in water are summarized,which are 2,4-dinitrophenylhydrazine derivatization method, headspace gas chromatography and purge-trap gas chromatography mass spectrometry. In addition, respective advantages and characteristics of these methods are showed through the comparison and analysis of the method principles, factors affecting the determi- nation and performance validation. The analysis results on actual water samples by these methods showed that there was no significant difference, and precision and accuracy of these methods all meet the monitoring require- ments.