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Flow injection simultaneous determination of synthetic colorants in food using multiple pulse amperometric detection with a boron-doped diamond electrode.
MedLine Citation:
PMID:  22967638     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
A single-line flow injection system and multiple pulse amperometric detection using a boron-doped diamond electrode were employed to develop and optimize a simple, low-cost, and rapid method for the simultaneous determination of two pairs of food colorants: tartrazine and sunset yellow (TT-SY) or brilliant blue and SY (BB-SY). A dual-potential waveform was used: E(det.1)=-150mV (400ms duration) and E(det.2)=-450mV (100ms duration) vs. Ag/AgCl (3.0molL(-1) KCl). Polarization at E(det.1) or E(det.2) causes reduction of SY or the respective pair of colorants, TT-SY or BB-SY; hence, with proper current correction, both colorants in each pair can be determined. The obtained linear response ranges (detection limits) were 5.0-60.0 (2.5) and 1.0-50.0 (0.80)μmolL(-1), for TT and SY, or 5.0-60.0 (3.5) and 1.0-50.0 (0.85)μmolL(-1), for BB and SY, respectively. Investigation of possible interferents (other food colorants or additives) showed no significant interference with the methods here proposed, which were then used to simultaneously determine the pairs of colorants in industrialized food samples, with results that showed good agreement with those obtained using a comparative HPLC method.
Authors:
Roberta A Medeiros; Bruna C Lourencao; Romeu C Rocha-Filho; Orlando Fatibello-Filho
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Publication Detail:
Type:  Journal Article     Date:  2012-07-23
Journal Detail:
Title:  Talanta     Volume:  99     ISSN:  1873-3573     ISO Abbreviation:  Talanta     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-09-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  883-9     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
Affiliation:
Departamento de Química, Universidade Federal de São Carlos, C.P. 676, 13560-970 São Carlos-SP, Brazil.
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