酸化エチレン蒸気中の微量アセトアルデヒドの検知管による迅速定量法

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  • A Rapid Method for the Microdetermination of Acetaldehyde in Ethylene Oxide Vapor by Means of Detector Tubes
  • サンカ エチレン ジョウキ チュウ ノ ビリョウ アセトアルデヒド ノ ケンチカン ニ ヨル ジンソク テイリョウホウ

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Granulated silica gel treated with hydroxylamine sulfate and thymol blue is used as a detecting agent for acetaldehyde in ethylene oxide vapor which gives orange yellow to intense red coloration when a definite amount of this-agent is filled in a small glass tube and 100 cc (30 cc) ethylene oxide vapor is passed through in 200 seconds (60 seconds) for quantitative determination of acetaldehyde in ethylene oxide vapor from the length of discolored column of the agent.<BR>Correction of an internal diameter of the detector tube, the relation between a length of discolored column and a concentration of acetaldehyde in ethylene oxide vapor, the effect of temperature of detector tube, etc.have been investigated. It was found that a simple quantitative determination of 0.003-0.3%(0.01-4.5%) acetaldehyde in ethylene oxide vapor was possible.

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