Gas chromatograph for analyzing krypton and xenon in liquid oxygen

The utility model discloses a gas chromatograph for analyzing krypton and xenon in liquid oxygen. A three-valve four-column is used as a separation technology carrier, a positive blowing and center cutting technology is used for improving the chromatographic peak separation degree, a small-volume quantitative loop is used for sampling, and a high-sensitivity helium ionization detector and a wide-range logarithmic amplifier are used for collecting signals, so that components Kr and Xe and harmful impurities CH4 and N2O in the liquid oxygen purification krypton-xenon process are linear in the concentration range. Instrument operation is controlled through the chromatographic workstation, recording of spectrogram data and result calculation are automatically completed, data export and judgment are facilitated, chromatographic analysis efficiency is improved, and quantitative accuracy of an analysis sample is guaranteed. 本实用新型公开了一种液氧中氪氙分析的气相色谱仪。以三阀四柱作为分离技术载体，采用正吹及中心切割技术提高色谱峰分离度，采用小体积定量环取样，用高灵敏度的氦离子化检测器和宽量程的对数放大器采