原子吸光分析法によるエステル類の間接定量

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書誌事項

タイトル別名
  • Indirect determination of esters by atomic absorption spectrophotometry
  • ゲンシ キュウコウ ブンセキホウ ニヨル エステルルイ ノ カンセツ テイリョ

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抄録

Ester compounds (ethyl maleate, monoethyl maleate, ethyl formate, butyl formate, isopentyl formate, pentyl acetate, ethyl acetate, methyl benzoate, methyl oxalate, dimethyl isophthalate, ethyl butyrate, ethyl propionate, ethyl hexanoate) were determined with good precision by atomic absorption spectrophotometry (A. A. S.). The recommended procedures are as follows : To 1 ml of each sample solution {(0.0353.482) mg/ml} is added 4 ml of hydroxylamine hydrochloride-sodium hydroxide solution (hydroxylamine hydrochloride 200 mg/ml and sodium hydroxide 120 mg/ml) and the mixture is warmed on a water bath for 5 min at 70°C. After cooling, 2 ml of hydrochloric acid solution (3 N), 2 ml of ferric chloride (Fe 3.3 mg/ml) and 5 ml of benzoic acid solution are added and the mixture is allowed to stand for 15 min. The mixture is filtered through No. 5 C Toyo Roshi filter paper. The filtrate is measured by A. A. S. Aluminum and copper ions interfered remarkably in the coexistence of (0.51.0) fold and more (metal/ethyl acetate, mol/mol) but potassium, magnesium, calcium, ethyl ether, acetone, acetic acid, aniline, nitrobenzene, propionaldehyde, phenol do not interfere up to 21 fold (compounds/ethyl acetate, mol/mol).

収録刊行物

  • 分析化学

    分析化学 28 (9), 513-516, 1979

    公益社団法人 日本分析化学会

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