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七十年代初,由于毛细柱内壁处理技术的新发展,一度冷落下来的毛细柱气体色谱重新获得了快速进展。现在,毛细柱气体色谱的应用已日益增长,其中内壁涂层毛细柱(SCOT)与高灵敏度的选择性电子捕获检测器结合的方法,在环境污染物分析及其他痕量分析方面受到了相当的重视。我们针对毛细柱的特点,改造了普通填充柱用的电子捕获检测器,试验了若干参数对检测器的影响,并已应用于若干有机含卤化合物的分析。一、仪器和试剂仪器: 改装的Hewlett Packard 5750型(HP-5750)气体色谱仪。检定器:~(63)Ni电子捕获检测器。色谱柱:1％SE-30(SCOT)玻璃毛细柱,长33m,内径0.27mm。试剂均为分析纯。二、仪器改装 1.减少汽化室体积从进样口至进样器的85mm处,装入一根不锈钢管(外径4mm,内径3mm)内衬经硅烷
In the early seventies, due to the new development of the capillary column wall treatment technology, once-cooled capillary gas chromatography regained rapid progress. Now, the use of capillary gas chromatography has been increasing. Among them, the method of combining SCOT with a high sensitivity selective electron capture detector has been used in environmental pollutants analysis and other trace analysis Pay attention. In view of the characteristics of the capillary column, we modified the electron capture detector used for the ordinary packed column, tested the influence of several parameters on the detector and has been applied to the analysis of several organic halogen-containing compounds. I. Instruments and Reagents Instrument: Modified Hewlett Packard 5750 (HP-5750) Gas Chromatograph. Detector: ~ (63) Ni electron capture detector. Column: 1% SE-30 (SCOT) glass capillary column, length 33m, inner diameter 0.27mm. Reagents are analytical grade. Second, the instrument modification 1. To reduce the volume of the vaporization chamber from the inlet to the injector 85mm Department, into a stainless steel tube (OD 4mm, ID 3mm) lined with silane