ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

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Cinnamohydroxamic acid, a new complexometric indicator for ferric ions

J. Majer and V. Špringer

Komenský University, Bratislava

 

Abstract: Cinnamohydroxamic acid (I) (prepn. described) forms a pink sol. complex with Fe(III) at pH 0.6-1.7. When the I:Fe3+ ratio is 1:1. I is suitable as a complexometric indicator for Fe3+ at pH 1.0-1.4 and 45-50°. Phosphate and tartrate even in high concn. do not interfere, while oxalate and F interfere in the direct titration of Fe3+. Of a large no. of cations only Ni2+, Cu2+ and Co3+ interfere. The reproducibility of the results is 0.2-0.3%.

Full paper in Portable Document Format: 168a633.pdf (in Slovak)

 

Chemical Papers 16 (8) 633–642 (1962)

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