Development of a new method for analysis of Sudan dyes by pressurized CEC with amperometric detection

Liu, Shaofeng; Zhang, Xue; Lin, Xucong; Wu, Xiaoping; Fu, FengFu; Xie, Zenghong

doi:10.1002/elps.200600486

Cited by 32 publications

(16 citation statements)

References 18 publications

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“…Figure 6 shows the preconcentration, separation, and detection of eight food dyes at 5 nM levels. The sensitivities of the method for R2, G3, Y4, Y5, B2, R40, and R3 samples were ,2.14, 0.54, 1.93, 1.73, 2.13, 1.85, and 0.83 nA/nM over the range of 2.5 nM-1.0 mM with the LODs between 1.25 and 5.0 nM with the micro- These results are much lower than those obtained in traditional CE [18][19][20], pressurized CEC with amperometric detection [21], liquid-liquid extraction [23], microemulsion EKC [24], GC [25], and large-volume sample stacking in CE methods [26] and comparable to those obtained in the HPLC method [22].…”

Section: Analytical Performances Of the Methodscontrasting

confidence: 79%

“…Since highly sensitive and selective detection of food dyes is of central importance to food safety as well as to forensic, biological, pharmaceuticals, and evolutionary studies, many efforts have been previously made with traditional CE [17][18][19][20], pressurized CEC [21], HPLC [22], liquid-liquid extraction [23], microemulsion EKC [24], GC [25], and large-volume sample stacking in a CE system [26]. The sensitivity of traditional methods is also sometimes not enough for trace analysis of food dyes in small quantities of real samples.…”

Section: Introductionmentioning

confidence: 99%

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Electrophoretic analysis of food dyes using a miniaturized microfluidic system

et al. 2008

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A simple and sensitive on-chip preconcentration, separation, and electrochemical detection (ED) method for the electrophoretic analysis of food dyes was developed. The microchip comprised of three parallel channels: the first two are for the field-amplified sample stacking (FASS) and subsequent field-amplified sample injection (FASI) steps, while the third one is for the micellar EKC with ED (MEKC-ED) step. The food dyes were initially extracted from real samples by employing a method that was simpler, easier, and faster compared with a standard method. The extraction of the samples was characterized by UV-Vis and electrochemical experiments. The chronoamperometric detection was performed with a glassy carbon electrode coupled horizontally with the microchip at the separation channel exit. Experimental parameters affecting the analytical performance of the method were assessed and optimized. The sensitivity of the method was improved by approximately 10,800-fold when compared with a conventional MEKC-ED analysis. Reproducible response was observed during multiple injections of samples with an RSD of<7.2% (n=5). The calibration plots were linear (r2=0.998) within the range of 1.0 nM-1.0 microM for all food dyes. LODs were estimated between 1.0 and 5.0 nM, based on S/N=3, for food dyes. The applicability of the method for the analysis of food dyes in real sample was demonstrated.

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Section: Analytical Performances Of the Methodscontrasting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Electrophoretic analysis of food dyes using a miniaturized microfluidic system

et al. 2008

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“…The LODs were in the range of 100-600 mg/L. Liu et al [18] employed pressurised CEC and amperometric detection to separate and detect the same four analytes. However, they achieved the separation in half the time (7 min compared to 15 min).…”

Section: Dyesmentioning

confidence: 98%

Determination of additives and organic contaminants in food by CE and CEC

Boyce¹

2007

Electrophoresis

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The application of CE to the analysis of additives and organic contaminants in food since 2001 has been reviewed. Additives included in the review are dyes, preservatives, antioxidants and sweeteners. Organic contaminants included in the review are pesticides, antibiotics and those produced during processing or cooking food. The review highlights the strategies and approaches adopted in making CE suitable for the determination of analytes at residue level and in complicated matrices.

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“…Um exemplo é o método desenvolvido recentemente por Liu et al, 77 que envolve a determinação de corantes Sudão em tempero culinário, empregando pCEC com detecção amperométrica.…”

Section: Detecção E Acoplamento Cec-msunclassified

Eletrocromatografia capilar: contextualização, estado da arte e perspectivas

Segato¹,

Silva²,

Jardim³

2009

Quím. Nova

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ElEtrocromatografia capilar: contExtualização, Estado da artE E pErspEctivas milena pinotti segato, césar ricardo silva e isabel cristina sales fontes Jardim* Instituto de Química, Universidade Estadual de Campinas, CP 6154, 13084-971 Campinas -SP, BrasilRecebido em 25/3/08; aceito em 21/8/08; publiado na web em 26/1/09 CAPILLARY ELECTROCHROMATOGRAPHY: CONTEXTUALIZATION, STATE-OF-THE-ART AND PERSPECTIVES. Capillary electrochromatography (CEC) is a separation technique in which the mobile phase flow is based on the application of a voltage across a packed capillary, which generates an electroosmotic flow that transports the analytes along the capillary toward the detector. As it combines the separation mechanisms of high-performance liquid chromatography (HPLC) and of capillary electrophoresis (CE), CEC can be considered a hybrid of HPLC and CE. This review presents some fundamental aspects of CEC and is focused on the instrumental advances of the technique, such as column technology, operation modes and detection systems, presenting recent papers on these topics and some applications and perspectives about CEC.

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Development of a new method for analysis of Sudan dyes by pressurized CEC with amperometric detection

Cited by 32 publications

References 18 publications

Electrophoretic analysis of food dyes using a miniaturized microfluidic system

Electrophoretic analysis of food dyes using a miniaturized microfluidic system

Determination of additives and organic contaminants in food by CE and CEC

Eletrocromatografia capilar: contextualização, estado da arte e perspectivas

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