摘要
建立顶空-毛细柱气相色谱法测定水中苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯和苯乙烯7种苯系物的方法。对色谱条件及顶空条件进行了优化,采用自动顶空进样方式,经70℃平衡30 min,用Rtx-Wax毛细管柱分离,使用火焰离子化检测器检测。7种苯系物的质量浓度在10~100μg/L范围内与其对应的色谱峰面积呈线性关系,相关系数在0.9990~0.9996之间,方法检出限为0.2~0.9μg/L,7种苯系物的回收率为96.5%~106.5%,测定结果的相对标准偏差为1.0%~2.2%(n=6)。该方法操作简单,重现性好,测定结果准确可靠,检出限满足国家标准要求,可用于水中7种苯系物的检测分析。
A method of headspace capillary gas chromatography was established for the determination of 7 benzene series compounds in water,including benzene,methylbenzene,ethylbenzene,paraxylene,m-xylene,o-xylene and styrene.The conditions of chromatography and headspace were optimited,the auto headspace mode for 30 min at 60℃,the objective was separated with the Rtx-Wax capillary column and detected with flame ionization detector(FID).Linear relationships between values of peak area and mass concentrations of 7 the benzene series compounds were kept in 10-100μg/L.The correlation coefficient of standard curves was 0.9990 to 0.9996.Detection limits of the method ranged from 0.2μg/L to 0.9μg/L.Values of recovery found were in the range of 96.5%-106.5%,and the relative standard deviation was 1.0%-2.2%.This method was simple,high in sensitivity accurate and precise.The detection limits perfectly meet the national standard.It was suitabled for the detection of the 7 benzene series compounds in water.
作者
贾亮亮
JIA Liangliang(The Institute of Hydrology and Engineering Geological Prospecting in Hebei Province,Shijiazhuang 050021,China)
出处
《化学分析计量》
CAS
2019年第6期52-54,共3页
Chemical Analysis And Meterage
关键词
顶空-气相色谱法
苯系物
水
headspace-gas chromatography
benzene series compounds
water
作者简介
通讯作者:贾亮亮,高级工程师,主要从事分析化学方面的研究工作,E-mail:jialiang0316@163.com。
