Traceability of zinc, cadmium, cobalt, copper, lead and manganese standard solutions based on EDTA chelatometric titration method.

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  • 亜鉛，カドミウム，コバルト，銅，鉛，マンガン標準液のＥＤＴＡキレート滴定法に基づく，亜鉛を基準物質とするトレーサビリティ
  • アエン カドミウム コバルト ドウ ナマリ マンガン ヒョウジュンエキ ノ E
  • 亜鉛,カドミウム,コバルト,銅,鉛,マンガン標準液のEDTAキレート滴定法に基づく,亜鉛を基準物質とするトレーサビリテイ

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Description

To establish the traceability of metal standard solutions of Zn, Cd, Co, Cu, Pb and Mn, the concentration of each metal standard solution (Cs) measured by EDTA chelatometric titration was compared with that (C) calculated from the weight of the dissolved metal. The EDTA solution was standardized with a high-purity Zn solution. The intersection of both the tangent at an inflection point and φ(indicator transition) =1 was adopted as an end point of titration. The inflection point was calculated from experimental data near the point with the approximation as a curve of the third order. The difference between Cs and C was within ±0.1% for each metal standard solution. The traceability of the metal standard solutions of Zn, Cd, Co, Cu, Pb and Mn was thus confirmed.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 38 (9), T149-T155, 1989

    The Japan Society for Analytical Chemistry

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