EDTA滴定法による鉛快削鋼中の鉛の定量

DOI Web Site Web Site

書誌事項

タイトル別名
  • Determination of Pb in Leaded Free Cutting Steels by Chelatometric Titration Method
  • EDTA テキテイホウ ニ ヨル ナマリカイサクコウ チュウ ノ ナマリ ノ テイリョウ

この論文をさがす

抄録

A simple chelatometric titration method for the determination of Pb in leaded free cutting steel has been developed. Interfering elements are removed by MIBK extraction and Pb is then determined by titration with EDTA. The procedure is as follows: Weigh 5 g of sample, add HCl, HNO3 and HCl O4, and evaporate to fume. Cool, dissolve the residue with 6 N HCl in a 100 mL. Volumetric flask and make up to the mark with 6 N HCl. Pipet 20 mL of solution into a separatory funnel, add MIBK and shake for 30 sec. Drain off the aqueous layer. Add HNO3 and HCl O4 and evaporate to fume. Cool, add water and swirl to dissolve the salts. Add triethanolamine and excess EDTA. The solution is adjusted to pH 10∼11 with NH4OH. Add KCN and back-titrate excess EDTA with standard Ca solution using thymolphthalein complexone as indicator.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (4), 265-269, 1961

    公益社団法人 日本金属学会

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