• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1992 Fiscal Year Final Research Report Summary

Purity tests of high-purity metals for the creation of new functional materials

Research Project

Project/Area Number 03650610
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 工業分析化学
Research InstitutionScience University of Tokyo

Principal Investigator

TANAKA Tatsuhiko  Science University of Tokyo, Faculty of Engineering, Assistant professor, 工学部第1部, 講師 (40084389)

Project Period (FY) 1991 – 1992
KeywordsHigh-purity metal / Trace analysis / Purity test / Microscale preconcentration / Cathodic stripping voltammetry / Coulometric titration / High-purity steel
Research Abstract

The present report describes the appropriate methods for the purity tests of high-purity metals for creating new functional materials.
1. Determination of trace impurities at the low ppm level in high-purity metals frequently requires preconcentration steps to improve detection limits, precision and accuracy. Microscale preconcentration techniques developed are useful for the analyses of expensive and precious samples available only in small quantities and studies of heterogeneous distribution of trace elements in high-purity metals. Microscale preconcentration techniques using 1- to 10-milligram samples and microliter volumes of solutions seem to be desirable from viewpoints of economy of high-purity reagents as well as minimization of experimental wastes. In addition, they require a narrower working bench space and sometimes are more rapid than conventional ones. Several simple apparatus and new techniques for ion exchange, liquid-liquid extraction and electrolytic separations have be … More en devised to attain easy and secure operations and ensure the precision and accuracy of analytical results.
2. Cathodic stripping voltammetry (CSV) is a highly sensitive analytical technique that combines a preconcentration step (pre-electrolysis) with a determination step (stripping). Some discrepancies between the experimental results of CSV were clarified and reliable practical methods were established for the determination of sulfur and manganese in high-purity metals.
3. Coulometric titration is one of the most precise and accurate techniques of chemical analysis and makes calibrations unnecessary. A few useful methods were proposed for directly purity tests of high-purity metals.
4. New, simple and rapid methods were developed for the determination of trace non-metal elements in high-purity steels. Carbon, sulfur and phosphorus in steels were determined in safety and with good precision and accuracy by a modified wet chemical oxidation-nonaqueous coulometric titration, CSV with a silver disk electrode after conversion of sulfur into hydrogen sulfide and reflectance photometry with a hydrogen sulfide of phosphine detecting tape, respectively. Less

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Tatsuhiko Tanaka: "Microscale ion exchange separation of traces of manganese in niobium and tantalum for graphite-furnace atomic absorption spectrometry" Analytical Sciences. 7. 503-505 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 九津見 啓之: "金属中の微量炭素定量における湿式酸化分解-非水溶媒電量滴定法の改良" 鉄と鋼. 77. 1897-1901 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tatsuhiko Tanaka: "Microscale electrolytic preconcentration of traces of lead and cadmium in silver" Analytica Chimica Acta. 252. 211-213 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tatsuhiko Tanaka: "Microscale preconcentration by liquid-liquid extraction of cadmium in indium and nickel" Mikrochimica Acta [Wien]. 106. 253-259 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tatsuhiko Tanaka: "Cathodic stripping voltammetry of sulfide with a silver disk electrode" Analytical Sciences. 8. 281-284 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tatsuhiko Tanaka: "Simple and rapid determination of sulfur in steel by reflectance photometry with a hydrogen sulfide detecting tape" Analytical Sciences. 8. 627-630 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 日本分析化学会編: "分析化学便覧(改訂4版)(分担執筆)" 丸善, 1426 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 分析化学ハンドブック 編集委員会編: "分析化学ハンドブック(分担執筆)" 朝倉書店, 1051 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tatsuhiko Tanaka: "A simple method for the purification of benzoic acid by entrainer sublimation" Anal.Sci.Vol.7. 345-346 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tatsuhiko Tanaka: "Microscale ion exchange separation of traces of manganese in niobium and tantalum for graphite-furnace atomic absorption spectrometry" Anal.Sci.Vol.7. 503-505 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroyuki Kutsumi: "A modified wet chemical oxidation-nonaqueous coulometric titration for the determination of traces of carbon in metals" Tetsu to Hagane. Vol.77. 1897-1901 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tatsuhiko Tanaka: "Microscale electrolytic preconcentration of traces of lead and cadmium in silver" Anal.Chim.Acta. Vol.252. 211-213 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tatsuhiko Tanaka: "Electrochemical analysis ; determination of water using a Karl Fischer reagent" Bunseki. Vol.1991. 444-451 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tatsuhiko Tanaka: "Microscale preconcentration by liquid-liquid extraction of cadmium in indium and nickel" Mikrochim. Acta [Wien]. Vol.106. 253-259 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tatsuhiko Tanaka: "Cathodic stripping voltammetry of sulfide with a silver disk electrode" Anal.Sci.Vol.8. 281-284 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tatsuhiko Tanaka: "Simple and rapid determination of sulfur in steel by reflectance photometry with a hydrogen sulfide detecting tape" Anal.Sci.Vol.8. 627-630 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tatsuhiko Tanaka: "Halogenated hydrocarbon-free coulometric Karl Fischer reagents" Bunseki. Vol.1992. 917-918 (1992)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1994-03-24  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi