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目的:建立水源水中巴豆醛的顶空气相色谱(HS-GC)测定方法。方法:水中的微量巴豆醛经顶空提取后,应用DB-624大口径毛细管色谱柱,采用程序升温方式进行GC分析,以保留时间定性,外标法定量。结果:巴豆醛的线性范围为6.2~500μg/L,最低检出浓度为4.4μg/L,r=0.9998,水样加标回收率为95.6%~96.3%,RSD为2.1%~2.9%。结论:方法仅用2.5 m in完成饮用水中巴豆醛的测定,操作简便、灵敏度高。
Objective: To establish a method for the determination of crotonaldehyde in water by headspace gas chromatography (HS-GC). Methods: The trace amount of crotonaldehyde in water was extracted by headspace, and then the GC-analysis was performed by DB-624 large-bore capillary column with programmed temperature increasing method. The retention time was qualitative and the external standard method was used for quantification. Results: The linear range of crotonaldehyde was 6.2-500μg / L, the minimum detectable concentration was 4.4μg / L, r = 0.9998. The recoveries were 95.6% -96.3% and RSD were 2.1% -2.9%. Conclusion: The method was applied to the determination of crotonaldehyde in drinking water in only 2.5 m in. The method was simple and easy to operate with high sensitivity.