【摘要】 设计了一套测定气体的可调压进样装置,提出了气相色谱法-脉冲放电氦离子化检测器测定大气中氪和氙的含量。通过采用低温分离、柱程序升温及高效吸气柱消除了样品中基体气体对氪、氙测定的干扰。氪和氙的检出限(3S/N)分别为11 pg和24 pg。更多还原

【Abstract】 A method of GC with pulse discharge helium ionization detector(PDHID) for the determination of krypton and xenon in air was proposed and the pressure adjustable installation for gas sample introduction was designed.The matrix interference of air was eliminated by low-temperature separation,temperature elevation programming of the column and the high efficiency getter column.Values of detection limit(3S/N) of krypton and xenon found were 11 pg and 24 pg,respectively.更多还原