A Trial of Determination of Caffein by Gaschromatography

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  • ガスクロマトグラフによるカフェインの定量法
  • ガスクロマトグラフ ニ ヨル カフェイン ノ テイリョウホウ

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A trial of determination of caffein in foods by gaschromatography was investigated. The method was as follows; moistened powdered food with 5% sodium carbonate solution was extracted with chloroform solution for 2-3 hrs. The extracts was concentrated, and 1ml of chloroform solution containing the ethylmyristate was added to the residue. The caffein was dissolved by the chloroform solution, then 5-20μl of the solution was injected to gaschromatography with microsilinder. Caffein was determined with internal standard method.

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