An Electrochemical Sensor for Simultaneous Determination of Ponceau 4R and Tartrazine Based on an Ionic Liquid Modified Expanded Graphite Paste Electrode

2014 ◽  
Vol 161 (9) ◽  
pp. H453-H457 ◽  
Author(s):  
Jing Zhang ◽  
Xue Wang ◽  
Shibo Zhang ◽  
Wenchang Wang ◽  
Masashi Hojo ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Electrochemical Sensor ◽  
Simultaneous Determination ◽  
Expanded Graphite ◽  
Graphite Paste Electrode ◽  
Ponceau 4R ◽  
Paste Electrode

Electrochemical Determination of Brilliant Blue and Tartrazine Based on an Ionic Liquid-Modified Expanded Graphite Paste Electrode

2015 ◽  
Vol 98 (3) ◽  
pp. 817-821 ◽  
Author(s):  
Wenchang Wang ◽  
Ye Chen ◽  
Jing Zhang ◽  
Xue Wang ◽  
Zhidong Chen
Keyword(s):  
Ionic Liquid ◽  
Simultaneous Determination ◽  
Soft Drink ◽  
Expanded Graphite ◽  
Brilliant Blue ◽  
Experimental Conditions ◽  
Graphite Composite ◽  
Graphite Paste Electrode ◽  
Paste Electrode

Abstract A sensitive electrochemical method was developed for the simultaneous determination of Brilliant Blue (BB) and tartrazine (Tz) using an ionic liquid-modified expanded graphite paste electrode (IL-EGPE). The IL-EGPE was prepared by mixing ionic liquid-expanded graphite composite (IL-EG) with solid paraffin. Compared with the EGPE, the IL-EGPE remarkably enhanced the electrocatalytic oxidation signals of BB and Tz. Under optimal experimental conditions, the designed IL-EGPE exhibited wide linear responses to BB and Tz ranging from 5.0 × 10–9 to 4.0 × 10–6 M and 1.0 × 10–8 to 1.0 × 10–6 M, respectively. The detection limits for BB and Tz were 2.0 × 10–9 M (1.6 ng/mL) and 3.3 × 10–9 M (1.8 ng/mL) at an S/N of 3, respectively. This electrode showed good reproducibility, stability, and reusability. The proposed method was successfully applied in the simultaneous determination of BB and Tz in a soft drink with satisfactory results.

Simultaneous determination of the isomers of Ponceau 4R and Amaranth using an expanded graphite paste electrode

2014 ◽  
Vol 160 ◽  
pp. 11-15 ◽  
Author(s):  
Jing Zhang ◽  
Meiling Wang ◽  
Chao Shentu ◽  
Wenchang Wang ◽  
Zhidong Chen
Keyword(s):  
Simultaneous Determination ◽  
Expanded Graphite ◽  
Graphite Paste Electrode ◽  
Ponceau 4R ◽  
Paste Electrode

The determination of 2-phenylphenol in the presence of 4-chlorophenol using nano-Fe3O4/ionic liquid paste electrode as an electrochemical sensor

2019 ◽  
Vol 554 ◽  
pp. 603-610 ◽  
Author(s):  
Hassan Karimi-Maleh ◽  
Colani T. Fakude ◽  
Nonhlagabezo Mabuba ◽  
Gbenga M. Peleyeju ◽  
Omotayo A. Arotiba
Keyword(s):  
Ionic Liquid ◽  
Electrochemical Sensor ◽  
Nano Fe3o4 ◽  
Paste Electrode

Electrochemical Sensing of Bisphenol A by a Didodecyldimethylammonium Bromide-Modified Expanded Graphite Paste Electrode

2016 ◽  
Vol 99 (4) ◽  
pp. 1066-1072 ◽  
Author(s):  
Jing Zhang ◽  
Sa Ma ◽  
Wenchang Wang ◽  
Zhidong Chen
Keyword(s):  
Aqueous Solution ◽  
Bisphenol A ◽  
Linear Response ◽  
Expanded Graphite ◽  
Electrochemical Sensing ◽  
Good Reproducibility ◽  
Didodecyldimethylammonium Bromide ◽  
Graphite Paste Electrode ◽  
Paste Electrode

Abstract An electrochemical and sensitive sensing of 2,2-bis(4-hydroxyphenyl) propane [bisphenol A (BPA)] was developed based on a didodecyldimethylammonium bromide-modified expanded graphite paste electrode (DDAB-EGPE). The DDAB-EGPE was prepared by suspending an EGPE in a DDAB aqueous solution, and allowing the DDAB to form a hydrophobic film on the expanded graphite surface. Compared with the EGPE, the DDAB-EGPE showed improved electrochemical response of BPA because of the preconcentration of BPA in DDAB via hydrophobic interaction. Due to the electrocatalytic activity of BPA, a sensor for BPA was constructed based on the DDAB-EGPE. The DDAB-EGPE exhibited a wide linear response to BPA ranging from 6.0 × 10−8 to 2.0 × 10−5 mol/L with a detection limit of 7.1 nmol/L at S/N = 3. The designed sensor showed good reproducibility and stability. The proposed sensor was successfully applied to the determination of BPA in three types of real plastic product samples. This sensor presented a simple, rapid, and sensitive platform for the determination of BPA and could become a versatile and powerful tool for food safety.

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