Name: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Sodium 6-hydroxy-5-((2-methoxy-5-methyl-4-sulfonatophenyl)diazenyl)naphthalene-2-sulfonate, is researched, Molecular C18H14N2Na2O8S2, CAS is 25956-17-6, about Simultaneous electrochemical quantification of foodstuff dyes allura red and tartrazine using a bare carbon paste electrode. Author is Rivera-Hernandez, S. I.; Corona-Avendano, S.; Vazquez-Huerta, G.; Palomar-Pardave, M.; Romero-Romo, M.; Ramirez-Silva, M. T..
A bare carbon paste electrode, BCPE, was used to determine simultaneously the foodstuff dyes Allura Red (AR) and Tartrazine (Trz) in aqueous media, achieving the following anal. parameters: for AR sensitivity of (0.126 ± 0.002) μA (mg l)-1 with a limit of detection (LOD) of (0.14 ± 0.004) mg l-1 and a Trz sensitivity of (0.392 ± 0.024) μA (mg l)-1 with a LOD of (0.310 ± 0.034) mg l-1. Addnl., the individual and simultaneous quantifications of AR and Trz in real samples, were performed through the electrochem. method proposed in this work. In the case of individual dyes quantification, the results were like those found using UV-vis spectrophotometry, however, contrary to the electrochem. method proposed in this work, the spectrophotometric method cannot be used for the simultaneous quantifications due to the dyes absorbance overlap. Furthermore, the BCPE is a robust electrode that, contrary to other modified CPE reported for this purpose, can be reused for multiple quantifications by simple mech. polishing of its electroactive surface, beside its excellent reproducibility, accuracy, and lifetime. Usually the dyes are found in concentrations of mg l-1 in foodstuffs, which makes this electrode suitable for use in foods and non-alc. beverages.
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Reference:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics