顶空固相微萃取气质联用法测定地表水中2-甲基萘  

Determination of 2-Methylnaphthalene in Surface Water by Headspace Solid-Phase Micro Extraction-Chromatography-Mass Spectrometry

作　　者：沈毅 朱英俊 吴小彬 陈峰 张宝锋 

机构地区：[1]浙江省杭州生态环境监测中心,浙江 杭州

出　　处：《环境保护前沿》2023年第3期649-654,共6页Advances in Environmental Protection

摘　　要：建立了顶空固相微萃取气质联用法测定地表水中2-甲基萘的方法。优化了色谱质谱条件和固相微萃取条件,比如色谱柱、萃取头、水样pH、萃取时间与温度。结果表明本方法在50~1000 ng/L线性范围具有良好的线性,r > 0.9991,2-甲基萘检出限为8.9 ng/L;3个加标水平下,实际水样中2-甲基萘的加标平均回收率为85.6%~91.4%,相对标准偏差为5.8%~9.8%。本方法可简便、准确地测定地表水中痕量2-甲基萘。A method was established to determine 2-methylnaphthalene in surface water by headspace sol-id-phase micro extraction-chromatography-mass spectrometry. The analytical conditions of chro-matographic-mass spectrometry and solid-phase microextraction were optimized, such as chro-matographic column, SPME fiber, pH of water sample, extraction time and temperature. The results indicate that,the calibration curve shows a good linearity for 2-methylnaphthalene (r > 0.9991) in the range of 50~1000 ng/L. the detection limit of 2-methylnaphthalene is 8.9 ng/L when using 10.0 mL surface water sample.At 3 different concentration levels, the average recoveries of 2-meth- ylnaphthalene in spiked practical surface water sample are in the range of 85.6%~91.4% with relative standard deviation of 5.8%~9.8%. The modified method can simply and accurately monitor 2-methylnaphthalene in surface water.

关 键 词：2-甲基萘 地表水 固相微萃取 气质联用 顶空 

分 类 号：O65[理学—分析化学]