Fogg, Arnold G. and Rahim, A. and Ahmad, Rahmalan and Yusoff, H. M. (1997) Cathodic stripping voltammetry of copper-complexed reactive dyes at a hanging mercury drop electrode : reactive violet 5. Talanta, 41 (1). pp. 125-129. ISSN 0039-9140
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Official URL: http://dx.doi.org/10.1016/S0039-9140(96)02014-0
Reactive Violet 5 and its hydrolysis product, which is produced as a side product in the dyeing process, can be determined in an admixture at sub-ppb levels by cathodic stripping voltammetry because the potentials of their azo reduction peaks are separated sufficiently. For both dyes, at intermediate pH values the azo peak is preceded by a complexed -copper reduction peak at a less negative potential, which aids the identification of the dyes. The use of pH 6 EDTA buffer removes the complexed-copper peak, as does the use of an acidic buffer (pH < 3). This unusual use of EDTA as a pH buffer facilitates the determination of mixtures of the dye and its hydrolysis product.
|Uncontrolled Keywords:||EDTA, hydrolysis product, reactive violet5, stripping voltammetry|
|Subjects:||Q Science > QD Chemistry|
|Deposited By:||Kamariah Mohamed Jong|
|Deposited On:||21 Nov 2012 04:01|
|Last Modified:||21 Nov 2012 04:18|
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