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Combined anion-exchange separation and spectrophotometric determination of traces of titanium in sea water

Kombinierte Anionenaustauscher-Trennung und spektralphotometrische Bestimmung von Titanspuren in Meerwasser

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Zusammenfassung

Titanspuren wurden in Gegenwart von Thiocyanat durch Anionenaustausch aus der angesäuerten Probe angereichert. Titan wird an Amberlite CG 400 (SCN−) stark adsorbiert und kann durch Elution mit 2M HCl — 1,5% H2O2 leicht abgelöst werden. Im Eluat wird es spektralphotometrisch mit Diantipyrylmethan bestimmt. Die kombinierte Methode gestattet eine selektive und empfindliche Bestimmung in einer 41-Probe von Meer- oder auch Süßwasser. Für einen Gehalt von ∼0,4 μg Ti/l beträgt der Variationskoeffizient 7%.

Summary

Traces of titanium in sea water have been preconcentrated by anion-exchange from acidified samples in the presence of thiocyanate. Titanium adsorbs strongly on a column of Amberlite CG 400 (SCN−) and can be stripped easily by elution with 2 M hydrochloric acid — 1.5% hydrogen peroxide solution. Titanium in the effluent is determined spectrophotometrically with diantipyrylmethane as colour reagent. The combined method allows to determine traces of titanium very selectively and sensitively in sea water as well as non-saline water on a 41 sample basis. The method yields a coefficient of variation of 7% at a titanium level of ∼0.4 μg per l.

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Authors and Affiliations

  1. Lab. for Chemistry, Fac. of Educat., Kagoshima Univ., Kagoshima, Japan

    Tetsuya Kiriyama & Mayumi Haraguchi

  2. Lab. for Anal. Chemistry, Fac. of Eng., Univ. of Chiba, Yayoi-cho, Chiba, Japan

    Rokuro Kuroda

Authors
  1. Tetsuya Kiriyama
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  2. Mayumi Haraguchi
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  3. Rokuro Kuroda
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Kiriyama, T., Haraguchi, M. & Kuroda, R. Combined anion-exchange separation and spectrophotometric determination of traces of titanium in sea water. Z. Anal. Chem. 307, 352–355 (1981). https://doi.org/10.1007/BF00480111

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  • DOI: https://doi.org/10.1007/BF00480111

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