有機化合物中のイオウの迅速微量定量

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書誌事項

タイトル別名
  • Rapid micro determination of sulfur in organic compounds
  • ユウキ カゴウブツ チュウ ノ イオウ ノ ジンソク ビリョウ テイリョウ
  • Organic elemental analysis by method of flask combustion. III
  • 燃焼フラスコ法による有機元素分析(III)

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抄録

Samples were decomposed by the flask-combustion method and the obtained sulfate was conductometrically titrated. <BR>Barium acetate was recommended as the titrant, whereby the appropriate concentration of iso-propyl alcohol in the titrant was 45% with optimum pH of 67. The lower limit of determination under these circumstances was 504 μg sulfate with its lowest concentration of 16.8 μg/ ml. <BR>Na+, Fe2+, Cl- and NO3- in their amounts usually met in the micro-elemental analysis did not interfere with the titration. Ca2+ was removed by the cation exchange resin treatment, and the interference of phosphate was eliminated by the treatment with silver nitrate, unless its amount was too large. In the actual titration, an automatic titrator (Potentiograph E-336 with Conductoscope E-165) was utilized, and the sulfur was determined in only 20 min. with an error of ±0.3%.

収録刊行物

  • 分析化学

    分析化学 13 (9), 847-852, 1964

    公益社団法人 日本分析化学会

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