顶空固相微萃取气相色谱质谱单离子监测法测定水中的多种己二酸酯

Determination of adipate in water with headspace solid-phase microextraction and single ion monitoring gas chromatography-mass spectrometry

采用顶空固相微萃取和气相色谱 质谱单离子监测技术,以己二酸二(1 丁基戊基)酯为内标,对水中的己二酸二乙酯、己二酸二异丁酯、己二酸二丁酯、己二酸二(2 丁氧基乙基)酯、己二酸二(乙基己基)酯进行了测定,考察了盐效应、萃取温度、萃取时间和热解吸时间等因素对方法灵敏度的影响。该方法对5种己二酸酯的检测限量为0.0220～5.49μg L,回收率为86.9%～102.0%,相对标准偏差为1.5%～7.3%。

Five kinds of adipates in water, such as diethyl adipate, dibutyl adipate, diisobutyl adipate, bis(2-butoxyethyl adiapte) and bis(2-ethyl hexyl) adipate, were determined by headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry in single ion monitoring mode (SIM). The operating conditions of SPME such as the extraction temperature, salt effect, extraction time and desorption time were studied. In the study, bis(1-butyl pentyl) adipate was selected as the internal standard. The detection limit, recovery and relative standard deviation (RSD) were 0.0220～5.49 μg/L, 86.89%～102.05% and 1.53%～7.31%, respectively.