Premium
Electrochemical method for quantitative determination of trace amounts of disperse dye in wastewater
Author(s) -
Santos Daniela P,
Trindade Magno A G,
Oliveira Ricardo A G,
Osugi Marly E,
Bianchi Alex R,
Zai Maria V B
Publication year - 2014
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/cote.12059
Subject(s) - detection limit , extraction (chemistry) , electrochemistry , differential pulse voltammetry , aqueous solution , chemistry , dimethylformamide , glassy carbon , solid phase extraction , trace amounts , analytical chemistry (journal) , chromatography , electrode , nuclear chemistry , cyclic voltammetry , organic chemistry , medicine , alternative medicine , pathology , solvent
The electrochemical behaviour of D isperse R ed 13 dye at a glassy carbon electrode was investigated in both organic and aqueous organic mixtures. Best results were obtained in N , N ‐dimethylformamide/ B ritton–Robinson buffer (1:1, v/v), which displays a well‐defined peak at ‐0.40 V ( vs A g/ A g C l) owing to reduction of the protonated nitro group. This method can be successfully applied to the electroanalytical determination of D isperse R ed 13 in a very simple and inexpensive way. All the differential pulse voltammetry parameters were optimised by using a glassy carbon electrode modified with poly(glutamic acid) films. The targeted analytical method presented a linear response from D isperse R ed 13 concentrations between 2.5 × 10 −7 and 3 × 10 −6 mol l −1 ( r = 0.997), with a detection limit of 1.5 × 10 −8 mol l −1 and recoveries of 89.7–95.10% in water samples. D isperse R ed 13 was successfully determined in textile industry wastewater by means of the proposed method after pre‐extraction in a solid‐phase extraction cartridge.