Abstract
Direct current and differential pulse polarographic and cyclic voltammetric studies of Procion blue MX-R (PB) and Cibacron blue 3GA (CB) and methods for the determination of PB and CB are reported. For both dyes reduction peaks are observed for the two-electron reversible reduction of the anthraquinone moiety, followed by one (CB) and two (PB) reduction processes associated with the reduction of the mono- and dichlorotriazine groups, respectively. These latter processes appear to involve the reductive elimination of the chlorine atoms: only the anthraquinone reduction process is observed when the dyes are hydrolysed. In alkaline solution the reduction processes are complicated by adsorption and kinetic effects. For this reason determination of the dyes is best carried out in acidic solution, but determination is also possible in alkaline solution, which would be more convenient for monitoring the dyes during dyeing and other nucleophilic reactions.
| Original language | English |
|---|---|
| Pages (from-to) | 41-54 |
| Number of pages | 14 |
| Journal | Analytica Chimica Acta |
| Volume | 315 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 30 Oct 1995 |
| Externally published | Yes |
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Keywords
- Anthraquinone
- Chlorotriazines
- Hydrolysis
- Polarography
- Reactive dyes
- Voltammetry
ASJC Scopus subject areas
- Analytical Chemistry
- Biochemistry
- Environmental Chemistry
- Spectroscopy
Cite this
Electrochemical investigations of reactive dyes; polarographic determination of anthraquinone-based chlorotriazine dyes. / Zanoni, M. Valnice B.; Fogg, Arnold G.; Barek, Jiri; Zima, Jiri.
In: Analytica Chimica Acta, Vol. 315, No. 1-2, 30.10.1995, p. 41-54.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical investigations of reactive dyes; polarographic determination of anthraquinone-based chlorotriazine dyes
AU - Zanoni, M. Valnice B.
AU - Fogg, Arnold G.
AU - Barek, Jiri
AU - Zima, Jiri
PY - 1995/10/30
Y1 - 1995/10/30
N2 - Direct current and differential pulse polarographic and cyclic voltammetric studies of Procion blue MX-R (PB) and Cibacron blue 3GA (CB) and methods for the determination of PB and CB are reported. For both dyes reduction peaks are observed for the two-electron reversible reduction of the anthraquinone moiety, followed by one (CB) and two (PB) reduction processes associated with the reduction of the mono- and dichlorotriazine groups, respectively. These latter processes appear to involve the reductive elimination of the chlorine atoms: only the anthraquinone reduction process is observed when the dyes are hydrolysed. In alkaline solution the reduction processes are complicated by adsorption and kinetic effects. For this reason determination of the dyes is best carried out in acidic solution, but determination is also possible in alkaline solution, which would be more convenient for monitoring the dyes during dyeing and other nucleophilic reactions.
AB - Direct current and differential pulse polarographic and cyclic voltammetric studies of Procion blue MX-R (PB) and Cibacron blue 3GA (CB) and methods for the determination of PB and CB are reported. For both dyes reduction peaks are observed for the two-electron reversible reduction of the anthraquinone moiety, followed by one (CB) and two (PB) reduction processes associated with the reduction of the mono- and dichlorotriazine groups, respectively. These latter processes appear to involve the reductive elimination of the chlorine atoms: only the anthraquinone reduction process is observed when the dyes are hydrolysed. In alkaline solution the reduction processes are complicated by adsorption and kinetic effects. For this reason determination of the dyes is best carried out in acidic solution, but determination is also possible in alkaline solution, which would be more convenient for monitoring the dyes during dyeing and other nucleophilic reactions.
KW - Anthraquinone
KW - Chlorotriazines
KW - Hydrolysis
KW - Polarography
KW - Reactive dyes
KW - Voltammetry
UR - http://www.scopus.com/inward/record.url?scp=0028849408&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028849408&partnerID=8YFLogxK
U2 - 10.1016/0003-2670(95)00285-8
DO - 10.1016/0003-2670(95)00285-8
M3 - Article
VL - 315
SP - 41
EP - 54
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
SN - 0003-2670
IS - 1-2
ER -