Adsorption trapping and pre-separation of lower aliphatic polysulfides in environmental and biological samples using a precolumn packed with a porous polymer beads, 2,6-diphenyl-p-phenylene oxide.

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  • ポーラスポリマービーズ，２，６‐ジフェニル‐ｐ‐フェニレンオキシド捕集管を用いた環境及び生体試料中の低級脂肪族多硫化物の濃縮と予備分離
  • ポーラス ポリマー ビーズ 2 6 ジフェニル p フェニレンオキシド ホシュ
  • ポーラスポリマービーズ,2,6-ジフェニル-p-フェニレンオキシド捕集管を用いた環境及び生体試料中の低級脂肪族多硫化物の濃縮と予備分離(<特集>超微量分析のための前処理と予備濃縮)

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Description

The pretreatment for GC of lower aliphatic polysulfides was investigated using a Tenax-GC precolumn (16 cm × 4 mm i.d., glass, 60/80 mesh). The sample was directly collected in the Tenax-GC precolumn by adsorption at room temperature. Then pre-separation process in the gas phase under nitrogen carrier gas flow was carried out to eliminate the sulfur compounds with lower to middle boiling points in the sample that were condensed on the Tenax-GC adsorbent. The Tenax-GC precolumn, which collected sample was purged with nitrogen carrier gas flow of 0.2 to 0.375 l/min at 25 °C. This pre-separation in the gas phase was necessary for the elimination of the large amounts of lower to middle boiling sulfur compounds, which interfered for the determination of the trace amount of lower aliphatic polysulfides by flame photometric detector-GC detection. The break through volume (10% loss) of several sulfur compounds was as follows: 4.5 l for thiophene, 25 l for dimethyl disulfide, 28 l for tetrahydrothiophene, 450 l for diethyl disulfide, 600 l for dimethyl trisulfide, respectively. Therefore, the lower aliphatic polysulfides were quantitatively recovered from the Tenax-GC precolumn in the pre-separation process in the gas phase. The maximum time for the pre-separation was less than 60 min.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 36 (11), 766-771, 1987

    The Japan Society for Analytical Chemistry

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