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热导检测器在气相色谱中广为应用,多年来国外为了提高它的灵敏度和改善稳定性,对检测器(热丝、检测器体积和形状、内部流路的形状、精密温控、电气线路等)进行了详细的研究和改进。方波供电、铼钨丝、前置放大、气体输送调节器等方法都可以提高灵敏度。但这些都不涉及热导检测器本身结构的改进,而且均需一定的条件和专用的仪器设备,不易广泛采用。我们从改进检测器本身结构和吊丝方法出发提出了一种结构新颖、吊丝独特从而提高了灵敏度的方法。
Thermal conductivity detector widely used in gas chromatography over the years abroad in order to improve its sensitivity and improve stability, the detector (hot wire, detector volume and shape, the shape of the internal flow path, precision temperature control, electrical wiring Etc.) conducted a detailed study and improvement. Square wave power supply, rhenium tungsten wire, preamplifier, gas delivery regulator and other methods can improve the sensitivity. However, these do not involve the improvement of the structure of the thermal conductivity detector itself, and require certain conditions and special instruments and equipment, which are not easy to be widely used. Based on the improvement of the structure of the detector itself and the method of hanging wires, we propose a novel structure and unique method of increasing the sensitivity of the hanging wire.