【作者】 李伟伟； 沈铮； 关亚风；

【Author】 Li Weiwei,Shen Zheng,Guan Yafeng (Department of Instum mention and Analytical Chemisty,Cas Key Laboray Aory of Separation Science for Analytical Chemisty Dalian Institute of Science,Dalian 116023)

【机构】 中国科学院大连化学物理研究所仪器分析化学室；

【摘要】 本文设计了一种新型气相色谱表面电离检测器（SID）,电离室和样品引入通道用石英材料制成,钼发射极绕在石英外壳的微型加热棒上。实验表明所设计的SID对所测的一些烷基胺类的灵敏度达到10^-15g/s～10^-13g/s,比现有SID灵敏度高4.1×10¹～3.1×10⁶倍,对叔胺样品最小检出量达fg级,比现有SID低约2个数量级。相对于三乙胺,SID对绝大多数有机溶剂的响应低10⁶～10⁸,因此具有极高的选择性。这种新型SID具有大于6个数量级的线性响应范围,能够高选择性高灵敏度的检测气体、水体和体液中的痕量有机胺,适用于有机胺类神经毒剂、爆炸残留物或毒品毒物中有机胺。更多还原

【Abstract】 A novel surface ionization detector using a quartz ionization cell and a Mo emitter with a quartz enclosed internal heater for selective measurement of organic amine by gas chromatography is designed and evaluated.The minimum detectable amount of the SID for alkane amines is between 10^-5～10^-13 g/s,and fg for tri - ethylamine.The selectivity of the SID to most organic solvents is between 10⁶～10⁸ relative to tri-ethylamine.The response linearity is over 6 orders of magnitude.It is a promising GC detector for determination of trace amount of amines in air,water and serum,such as nerve gas,residue of explosives and drugs.更多还原