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Spectrophotometric determination of oxalic acid in presence of glyoxylic acid and chloride

โœ Scribed by G. Pierre; M.El Kordi; G. Cauquis

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
370 KB
Volume
185
Category
Article
ISSN
0003-2670

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โœฆ Synopsis

Glyoxyhc acid gives a yellow 1:l complex, [Fe-CHOC00]2+ with iron(II1). The dissociation constant, measured by two spectrophotometric methods, is K = 9.7 + 1 mol 1-l. Oxalic acid gives two complexes with iron(II1) which absorb in the same range around 400 nm. With appropriate precautions and corrections, oxalic acid concentrations of about 1O-1-lO-2 M can be determined in the presence of glyoxylic acid and chloride.

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