Elsevier

Analytica Chimica Acta

Volume 83, May 1976, Pages 297-307
Analytica Chimica Acta

The systematic error in photometric set-point titrations of submicromolar amounts of calcium and zinc

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Abstract

Although reproducible results can be obtained in photometric set-point titrations of submicromolar amounts (5·10−5 M and higher) of calcium(II) and zinc(II) by using an automatic titrator, the systematic error can be considerable. This error is partly intrinsic in nature, but there is an additional error caused by dilution in successive titrations. Accurate values can be obtained only when standardization and actual titrations are performed under the same conditions of dilution, set-point, indicator concentrations, etc.

References (9)

  • J. Kragten

    Talanta

    (1971)
  • F. Freese et al.

    Anal. Chim. Acta

    (1972)
  • J. Slanina et al.

    Z. Anal. Chem.

    (1972)
  • J.B. Headridge
    (1961)
There are more references available in the full text version of this article.

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