Extraction-spectrophotometric determination of iron(II) by ternary complex formation with pyrocatechol violet and cetyltrimethylammonium bromide

A method for iron(II) determination based on reaction with Pyrocatechol Violet to form a 1:2 binary complex at pH 5–7 is described and has been extended to an extraction—spectrophotometric procedure for the determination of iron(II) by formation of the 1:2:2 iron(II)—Pyrocatechol Violet—cetyltrimeth...

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Bibliographic Details
Published in:Talanta (Oxford) 1988-04, Vol.35 (4), p.253-257
Main Authors: Tarek, M., Zaki, M., Mahmoud, W.H., El-Sayed, A.Y.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Spectrometric and optical methods
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Summary:A method for iron(II) determination based on reaction with Pyrocatechol Violet to form a 1:2 binary complex at pH 5–7 is described and has been extended to an extraction—spectrophotometric procedure for the determination of iron(II) by formation of the 1:2:2 iron(II)—Pyrocatechol Violet—cetyltrimethylammonium bromide ternary complex. The molar absorptivities of the binary and ternary complexes at 595 and 605 nm are 6.55 × 10 4 and 1.35 × 10 51.mole −1.cm −1, respectively. The method has been successfully applied to the determination of iron in felspar, Portland cement and sodium hydroxide.
ISSN:0039-9140
1873-3573
DOI:10.1016/0039-9140(88)80081-X