| Literature DB >> 25442632 |
Meiling Wang1, Yunqiao Gao1, Qian Sun1, Jianwei Zhao2.
Abstract
In the present work, a novel strategy based on new carbon nanotube (CNT) and polypyrrole (ppy) composite modified electrode for the simultaneous determination of the isomers of Amaranth (E123) and Ponceau 4R (E124) was proposed. Due to the increasing dispersibility and effective surface area of the CNT caused by decoration of ppy to the CNT, the proposed electrode exhibited excellent electrochemical sensitivity and high selectivity toward the oxidation of Amaranth and Ponceau 4R. The linear response ranges for Amaranth and Ponceau 4R were 5.0 × 10(-9)M-5.0 × 10(-7)M, and 8 × 10(-9)M-1 × 10(-6)M and corresponding detection limits as low as 5.0 × 10(-10)M and 1.0 × 10(-9)M, respectively. This proposed method was successfully applied in the detection of Ponceau 4R and Amaranth in fruit drink samples.Entities:
Keywords: Acetic acid (PubChem CID: 176); Amaranth; Amaranth (PubChem CID: 6093196); Boric acid (PubChem CID: 7628); Ferrous chloride (PubChem CID: 24458); Food analysis; Hydrogen peroxide (PubChem CID: 784); Isomers; Phosphoric acid (PubChem CID: 1004); Polypyrrole (PubChem CID: 3811882); Ponceau 4R; Ponceau 4R (PubChem CID: 9570119); Pyrrole (PubChem CID: 8027); Simultaneous determination; Sodium hydroxide (PubChem CID: 14798)
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Year: 2014 PMID： 25442632 DOI： 10.1016/j.foodchem.2014.09.157
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514