吹扫捕集GC-MS法测定地下水中的TAME  

Determination of Methyl Tert-pentyl Ether in Groundwater by Purge and Trap Gas Chromatography-Mass Spectrometry

作　　者：王瑞 陈云飞 王雪 张琦琦 毛世峰 WANG Rui;CHEN Yunfei;WANG Xue;ZHANG Qiqi;MAO Shifeng(Hangzhou Zhongyi Testing Institute Co.,Ltd.,Hangzhou 310052;Zhejiang Zhongyi Testing Institute Co.,Ltd.,Ningbo 315048)

机构地区：[1]杭州中一检测研究院有限公司,杭州310052 [2]浙江中一检测研究院股份有限公司,宁波315048

出　　处：《食品工业》2021年第12期440-444,共5页The Food Industry

摘　　要：建立吹扫捕集-气相色谱-质谱法测定地下水中甲基叔戊基醚的检测方法。通过对吹扫捕集仪的工作条件进行优化,确定最佳的吹扫捕集条件:吹扫温度40℃,吹扫时间15 min,脱附温度250℃,脱附时间2 min。甲基叔戊基醚在10~200μg/L浓度范围内与响应值呈良好的线性关系,线性相关系数r≥0.995。地下水中甲基叔戊基醚的检出限为1.0μg/L,3个不同浓度点(10.0,50.0和200μg/L)的加标回收率为77.3%~92.8%,测定结果的相对标准偏差(SRSD)为1.9%~3.8%(n=6)。该方法具有良好的精密度与准确度,适用于地下水中甲基叔戊基醚的分析检测。A method for determination of methyl tert-pentyl ether in groundwater by purge and trap gas chromatographymass spectrometry was established.Through optimizing the purge and trap conditions,the best purge and trap condition was determined that purge temperature was 40℃,purge time was 11 min,desorption temperature was 245℃,and desorption time was 2 min.The linear range of methyl tert-pentyl ether was 10-200μg/L,and the correlation coefficients were more than 0.995.The detection limits(SLOD)of tetrahydrofuran was 1.0μg/L.The recoveries of methyl tert-pentyl ether in 3 different concentration levels(10.0,50.0 and 200μg/L)were ranged from 77.3% to 92.8%,and the relative standard deviation(SRSD,n=6)was ranged from 1.9% to 3.8%.This method could guarantee the accuracy of qualitative results for qualitative analysis and could realize a higher accuracy and precision.So it was suitable for the analysis and detection of methyl tert-pentyl ether in groundwater.

关 键 词：吹扫捕集 气相色谱-质谱法 甲基叔戊基醚 地下水 

分 类 号：X832[环境科学与工程—环境工程] O657.63[理学—分析化学]