MgNH<SUB>4</SUB>PO<SUB>4</SUB>-EDTAおよびPb(NO<SUB>3</SUB>)<SUB>2</SUB>-EDTA法によるリン酸および硫酸イオンの容量分析

DOI Web Site Web Site

書誌事項

タイトル別名
  • Chelatometric determination of phosphate and sulfate ions as magnesium ammonium phosphate and lead sulfate
  • MgNH4PO4-EDTA オヨビ Pb NO3 2-EDTAホウ ニ ヨル リンサン オヨビ リュウサン イオン ノ ヨウリョウ ブンセキ
  • Determination of sulfate ion with EDTA. III
  • EDTAによる硫酸イオンの定量(第3報)

この論文をさがす

説明

A method of determination of phosphate and sulfate ions in a mixed sample containing phosphate and sulfate ions has been investigated. Namely, a weakly acidic sample solution is treated with ammonium nitrate and magnesium nitrate, made alkaline with ammonia, and the phosphate ion is precipitated as magnesium-ammonium phosphate. The precipitate is dissolved in hydrochloric acid and the magnesium ion is titrated with a standard solution of EDTA using EBT as an indicator for the determination of phosphate ion. The filtrate after separation of the precipitate is heated to drive off ammonia, the residue is made acidic with acetic acid, and the sulfate ion is precipitated as lead sulfate by the addition of alcohol (to 2530%) and lead nitrate in a definite excess. The excess of lead ion at pH 5 is titrated with a standard solution of EDTA using Xylenol Orange as an indicator. In this method, a mixed sample containing 150 mg each of phosphate and sulfate ions can be determined with an error of O.10.3%.

収録刊行物

  • 分析化学

    分析化学 9 (1), 1-5, 1960

    公益社団法人 日本分析化学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ