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本文报道在 SP-2305E 型气相色谱仪上,采用由聚合物固定相 GDX-104柱(80/100目,φ4×600ram)、钠石灰柱(40/60目,φ4×350mm)及5A 分子筛柱(60/80目,φ4×2000mm)所组成的单气路双柱跨鉴定器(热导池)色谱流程,以氢为载气(40ml/min),桥流160mA,柱箱温度50°С,一次进样测定呼吸气体氧及二氧化碳含量的方法。进样量1ml,完成一次分析的周期为4 1/2min。氧测定的精确度与 Scholander 微量呼吸气体分析方法相当,二氧化碳测定的精确度则优于后者。还比较了分别以氢或氩为载气时的定量结果。并就定量方法及“氩校正”问题进行了讨论。
In this paper, a gas chromatography system consisting of a GDX-104 column (80/100 mesh, φ4 × 600 mm), a soda lime column (40/60 mesh, φ4 × 350 mm) and a 5A molecular sieve column (60/80 mesh, φ4 × 2000mm) consisting of single-circuit double-column cross-finder (thermal conductivity cell) chromatographic process, the hydrogen carrier gas (40ml / min), bridge current 160mA, oven temperature 50 ° С , A sample of breath oxygen and carbon dioxide measurement method. Injection volume 1ml, to complete an analysis of the cycle 4 1 / 2min. The accuracy of oxygen determination is comparable to that of the Scholander micropore gas analysis method, and the accuracy of carbon dioxide determination is superior to the latter. The quantitative results were also compared with hydrogen or argon as the carrier gas respectively. The quantitative method and “argon calibration” were discussed.