title: Electrochemical treatment of textile dyes and their analysis by high-performance liquid chromatography with diode array detection.
abstract: Several textile dyes were individually exposed to electrochemical treatment. Chromaticity variation and the formation of degradation products were followed using a UV spectrophotometer and HPLC with diode array detection. Dyes studied belong to the azo (color index, C.I. 15,510), methine (C.I. 48,013), indigo (C.I. 73,040), natural (C.I. 75,760) and arylmethane (C.I. 42,000) classes. Aliquots of the solutions treated at constant potential were analyzed and compared with control dye solutions. The final electrolysis solutions obtained by using different electrode materials: Pt, Ti and diamond presented different chromatograms. It was found that the novel (in this application) diamond electrode is efficient in studying the degradation of various dyes. Possible fragmentation and molecule moiety rearrangement are proposed as a result of the electrochemical treatment.
authors.affiliation: Facultad de Ciencias Químicas, Universidad Autónoma de Puebla, Pue., Mexico.
authors.forename: M M
authors.initials: MM
authors.lastname: Dávila-Jiménez
authors.forename: M P
authors.initials: MP
authors.lastname: Elizalde-González
authors.forename: A
authors.initials: A
authors.lastname: Gutiérrez-González
authors.forename: A A
authors.initials: AA
authors.lastname: Peláez-Cid
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004396:Coloring Agents / Q000032:analysis*; D004563:Electrochemistry; D004566:Electrodes; D005240:Feasibility Studies; D010084:Oxidation-Reduction; D013783:Textile Industry
chemical_list: D004396:Coloring Agents