caa a22 4500 465748392 CHVBK 20180323111827.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00323196 doi (NATIONALLICENCE)springer-10.1007/BF00323196 Electrochemical investigations on the analysis of reactive dyes with monoazo- and monoanthraquinone structures [Elektronische Daten] [Uwe Sahm, Dierk Knittel, Eckhard Schollmeyer] Summary: Qualitative voltammetric determination of reactive dyes is possible down to concentrations of about 10−5 mol/l using DC-polarography. Using rotating solid electrodes (glassy carbon) a detection limit of about 10−4 mol/l can be obtained. Reduction involves chiefly only the azo- and anthraquinoid groups, respectively, whereas the reactive functionality of these dyes shows electroactivity at much more negative potentials. Only the dichloro-quinoxaline group gives signals superimposed on the reduction of anthraquinoid groups. Discrimination between an original reactive dye and its hydrolysate (containing a hydrolytically destroyed reactive group) can be achieved, if the dye contains further cleavable groups such as benzamido substituents in conjugation to the chromophor as is seen with Azo-red I. Cleavage of such a group shifts the reduction potential for about 130 mV to more negative values. Springer-Verlag, 1990 Sahm Uwe Deutsches Textilforschungszentrum Nord-West e. V., Institut an der Universität Duisburg Gesamthochschule, Frankenring 2, W-4150, Krefeld 1, Federal Republic of Germany aut Knittel Dierk Deutsches Textilforschungszentrum Nord-West e. V., Institut an der Universität Duisburg Gesamthochschule, Frankenring 2, W-4150, Krefeld 1, Federal Republic of Germany aut Schollmeyer Eckhard Deutsches Textilforschungszentrum Nord-West e. V., Institut an der Universität Duisburg Gesamthochschule, Frankenring 2, W-4150, Krefeld 1, Federal Republic of Germany aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/7(1990-01-01), 824-830 0937-0633 338:7<824 1990 338 216 https://doi.org/10.1007/BF00323196 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00323196 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sahm Uwe Deutsches Textilforschungszentrum Nord-West e. V., Institut an der Universität Duisburg Gesamthochschule, Frankenring 2, W-4150, Krefeld 1, Federal Republic of Germany aut NATIONALLICENCE 700 1- Knittel Dierk Deutsches Textilforschungszentrum Nord-West e. V., Institut an der Universität Duisburg Gesamthochschule, Frankenring 2, W-4150, Krefeld 1, Federal Republic of Germany aut NATIONALLICENCE 700 1- Schollmeyer Eckhard Deutsches Textilforschungszentrum Nord-West e. V., Institut an der Universität Duisburg Gesamthochschule, Frankenring 2, W-4150, Krefeld 1, Federal Republic of Germany aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/7(1990-01-01), 824-830 0937-0633 338:7<824 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer