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Uso de irradiação de microondas na determinação espectrofotométrica de cromo com EDTA
Author(s) -
Alexandre Cunha Costa,
Júlio César Rosa Assis,
André Luís Carvalho Torres,
Sérgio L.C. Ferreira,
Maria das Graças Andrade Korn,
Leonardo Sena Gomes Teixeira
Publication year - 1999
Publication title -
química nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.214
H-Index - 73
eISSN - 1678-7064
pISSN - 0100-4042
DOI - 10.1590/s0100-40421999000200009
Subject(s) - chemistry , nuclear chemistry
Cr(III) slowly forms a violet complex with EDTA at pH 2.5-5.0 under normal conditions. The complex formation can be accelerated by irradiating the reacting mixture with microwave energy. The complex Cr(III)-EDTA is completely formed within 3 minutes of microwave irradiation and followed by a simple and rapid method for spectrophotometric determination of chromium. The method may be successfully applied to determination of chromium in catalyst

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