顶空-气相色谱法同时测定水中正丁醇、异丁醇、正丁醛和异丁醛

Simultaneous Determination of n-Butanol, iso-Butanol, n-Butanal and iso-Butanal in Water by GC with Headspace

摘要: 采用顶空-气相色谱法同时测定水中正丁醇、异丁醇、正丁醛和异丁醛的含量。顶空平衡温度为60℃，顶空加热平衡时间为30 min。用HP-INNOWAX色谱柱（30.0 m×0.53 mm，1.0 μm）分离，氢火焰离子化检测器检测。4种化合物的质量浓度在一定范围内与其对应的峰面积呈线性关系，方法的检出限为6.96~11.17 μg·L^-1。以空白样品为基体进行加标回收试验，所得回收率为80.0%~116%，测定值的相对标准偏差（n=6）为3.2%~9.1%。

Abstract: GC with headspace was applied to the simultaneous determination of n-butanol, iso-butanol, n-butanal and iso-butanal in water. The equilibrium temperature and heating equilibrium time of head space were set at 60℃ and 30 min. The analytes were separated on HP-INNOWAX chromatographic column (30.0 m×0.53 mm, 1.0 μm) and detected by FID. Linear relationships between values of peak area and mass concentration of the 4 compounds were kept in definite ranges. Detection limits of the method ranged from 6.96 μg·L^-1 to 11.17 μg·L^-1. On the base of blank sample, test for recovery was made by standard addition method. Values of recovery found were in the range of 80.0%-116%, with RSD's (n=6) in the range of 3.2%-9.1%.