Abstract.
A simple, rapid and accurate complexometric method is proposed for the determination of titanium(IV) where sodium potassium tartrate or ascorbic acid were used as masking agents. In the presence of diverse metal ions, titanium is first complexed with excess of EDTA and surplus EDTA is then titrated at pH 5–6 with zinc sulfate, xylenol orange being used as indicator. An excess of 5% aqueous sodium potassium tartrate is then added to displace the complexed EDTA from the Ti-EDTA complex quantitatively, which is titrated with zinc sulfate. Also, ascorbic acid may be used as the releasing agent. The methods work well in the range 1–53 mg of Ti(IV) for sodium potassium tartrate with relative errors ± 0.28% and standard deviations ≤ 0.16 mg. For ascorbic acid the range is 1.00–30.00 mg of Ti(IV) with relative errors of ± 0.40% and standard deviations of ≤ 0.05 mg
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Received October 9, 2001; accepted August 2, 2002
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Sreekumar, N., Bhat, N., Narayana, B. et al. Selective Complexometric Determination of Titanium(IV) Using Sodium Potassium Tartrate or Ascorbic Acid as Masking Agent. Microchim. Acta 141, 29–33 (2003). https://doi.org/10.1007/s00604-002-0922-8
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DOI: https://doi.org/10.1007/s00604-002-0922-8