提高GCMS离子源温度准确定量低浓度DEHP和PAHs

发布时间：2018-03-18 10:23

  本文选题：气相质谱　切入点：离子源温度　出处：《中国环境监测》2016年06期 　论文类型：期刊论文

【摘要】：为解决GCMS难以准确定量环境样品中低浓度多环芳烃、酞酸酯类等高沸点、难挥发性有机物的难题,对比了GC进样口温度与MS温度对测定低浓度邻苯二甲酸二(2-乙基己)酯(DEHP)、PAHs的影响。结果证明,MS离子源温度是准确定量DEHP、PAHs的关键因素,通过提高MS离子源温度能大幅度提高PAHs的灵敏度,且MS温度对沸点越高的PAHs灵敏度影响越大。在高MS离子源温度(330℃)条件下,建立了16种PAHs的SIM校准曲线,定量浓度低至5 ng/m L,表现出极高的灵敏度。为今后开发各类环境中低浓度难挥发性有机物的GCMS定量方法提供借鉴意义。
[Abstract]:In order to solve the problem that GCMS is difficult to accurately quantify low concentration polycyclic aromatic hydrocarbons (PAHs), phthalates and volatile organic compounds (VOCs) in environmental samples, The effects of GC injection temperature and MS temperature on the determination of low concentration DEHP- (2-ethylhexyl) phthalate PAHs were compared. The results showed that the temperature of MS ion source was the key factor for accurate quantification of DEHP- (2-ethylhexyl) phthalate PAHs. The sensitivity of PAHs can be greatly improved by increasing the temperature of MS ion source, and the influence of MS temperature on the sensitivity of PAHs with higher boiling point is greater. Under the condition of high MS ion source temperature of 330 鈩，

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