气相-动态顶空进样技术用于矿泉水中61种有机物的同时检测

Simultaneous Determination of 61 Organic Compounds in Mineral Water by Dynamic Headspace Sampling Method Coupled with Gas Chromatography-Mass Spectrometry

摘要: 采用气相动态顶空进样-气相色谱-质谱法(D-HS-GC-MS)同时分析矿泉水中氯乙烯、氯丁二烯、硝基苯、硝基氯苯、1,3,5-三氯苯和其他54 种常见挥发性有机物,方法检出限除硝基苯、2-硝基氯苯、3+4-硝基氯苯分别为5.9、6.4 和9.9 mg/ L 外,其余均介于0.18 ~ 0.48 mg/ L.D-HS-GC-MS 法均有良好的精密度和精确度,1.00 和2.00 mg/ L 空白加标样品的测定结果精密度分别介于5.8% ~19%和2.0% ~11% (n=7),市售矿泉水样品的加标回收率介于92.4% ~108%.

Abstract: A dynamic headspace sampling method coupled with gas chromatography-mass spectrometry (D-HS-GC-MS) has been established to detect 61 organic compounds in mineral water. Compounds included vinyl chloride, chloroprene, nitrobenzene, nitrochlorobenzenes, 1,3,5-trichlorobenzene and other 54 volatile organic compounds. The detection limits of D-HS-GC-MS method were 5.9, 6.4 and 9.9 μg/L for nitrobenzene, 2-nitrochlorobenzene and 2+4-nitrochlorobenzenes, 0.18 to 0.48 μg/L for others. RSDs of spiked blank samples at 1.00 and 2.00 μg /L were 5.8% to 19% and 2.0% to 11%, while recoveries of mineral water were 92.4% to 108%.