Voltammetric Determination of Allura Red AC onto Carbone‐paste Electrode Modified by Silica with Embedded Cetylpyridinium Chloride

Abstract

In current study the carbon‐paste electrode modified by silica with embedded cetylpyridinium chloride for determination of Allura Red AC have been developed. The optimal conditions were determined to be for the square‐wave voltammetric quantification: pH=2, Eads=300 mV, tads=300 s, amplitude – 40 mV, frequency – 25 Hz and potential scan rate is 250 mV sec−1. The calibration plot has linearity in the concentration ranges 0.04–0.2 μM and 0.2–1.00 μM. The LOD and LOQ are equal to 0.005 μM and 0.015 μM respectively. The crafted sensor has been applied successfully to model solutions and in jelly candies analysis with RSD no more than 10 %.

Determination of Allura Red AC with a β‐Cyclodextrin‐Modified Carbon Paste Electrode

“…On the one hand, this is the use of a simple, affordable and cheap electrode modifier. On the other hand, a significant decrease in the amount of the analyzed sample is achieved ‐ down to one drop (10 μL), which could not be achieved in previous studies [19–30] . In general, the developed technique is simple, sensitive and environmentally friendly.…”

“…On the other hand, a significant decrease in the amount of the analyzed sample is achieved -down to one drop (10 μL), which could not be achieved in previous studies. [19][20][21][22][23][24][25][26][27][28][29][30] In general, the developed technique is simple, sensitive and environmentally friendly.…”

“…The main analytical characteristics of previously developed sensors for Allura Red AC voltammetric determination are presented in Table 2. The proposed sensor is not inferior in sensitivity to the best analogs [19][20][21][22][23][24][25][26][27][28][29][30] presented in Table 2. Although in some cases known sensors are more sensitive than the proposed one, they require the use of expensive and rare modifiers.…”

“…Voltammetry is electrochemical method of analysis, and has recently been increasingly used to develop new, fast, cheap, and selective sensors [11] . Over the past ten years, the literature has described a large number of voltammetric sensors developed for various purposes, in particular, for the analysis of pharmaceuticals, [12–14] natural antioxidants [15,16] and food dyes [17–19] . Thus, a number of sensors modified with metal nanoparticles, [20–22] surfactants, [19,23] carbon nanomaterials, [24–27] ionic liquids [28–30] and others have been described to determination of Allura Red AC.…”

“…[11] Over the past ten years, the literature has described a large number of voltammetric sensors developed for various purposes, in particular, for the analysis of pharmaceuticals, [12][13][14] natural antioxidants [15,16] and food dyes. [17][18][19] Thus, a number of sensors modified with metal nanoparticles, [20][21][22] surfactants, [19,23] carbon nanomaterials, [24][25][26][27] ionic liquids [28][29][30] and others have been described to determination of Allura Red AC. One of the disadvantages of voltammetry is a large amount of sample for measurements (∼ 15-25 mL).…”