キャピラリーガスクロマトグラフィー用大量試料導入法の開発と応用

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タイトル別名
  • Development of large volume injection method for capillary GC.
  • キャピラリー ガス クロマトグラフィーヨウ タイリョウ シリョウ ドウニュウホ

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A new large volume injection method (dynamic retention gap method; DRG) for capillary/GC was developed. The retention gap consisted of a fused silica tube (2 m × 0.53 mm i.d.) and the precolumn (0.5 m × 0.53 mm i.d. × 0.5 μm) was connected with the capillary column by a T-shape connector. A large volume of sample solution (30 μl) vapoized in the injection port was rapidly introduced to the retention gap under large flow rate of carrier gas (20 ml/min). The sample was concentrated on the head of the precolumn by solvent focusing and liquid phase focusing. The sample was rapidly reconcentrated on the head of the analytical column because of a smaller phase ratio of the analytical column to that of the precolumn. This double focusing of sample enabled a large volume injection without decrease of the resolution of the analytical column. High linearity between injection volume and peak area of paraffins (C12 to C36) was observed with an injection volume of 1 to 30 μl in the DRG method. The performance of the DRG method was compared with that of a splitless method using a pesticide mixture and dioxin as test substances. The peak areas of the pesticides by the DRG method were 1.5 to 50.6 times larger than those by the splitless method for the same injection volume. The peak areas of dioxin were 6.6 to 11.7 times large by the DRG method with an injection of 10 μl of sample solution than by the splitless method with an injection of 2 μl. No decrease in resolution of dioxin isomer was observed. Received

収録刊行物

  • 分析化学

    分析化学 42 (10), 573-579, 1993

    公益社団法人 日本分析化学会

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