پديدآورندگان :
Rezaei Rasoul rasoul854699@gmail.com Islamic Azad University, Kerman Branch , Foroughi Mohammad Mehdi rasoul854699@gmail.com Islamic Azad University, Kerman Branch , Beitollahi Hadi rasoul854699@gmail.com Graduate University of Advanced Technology , Jahani Shohreh rasoul854699@gmail.com Bam University of Medical Sciences , Tajik Somayeh rasoul854699@gmail.com Bam University of Medical Sciences
كليدواژه :
Sudan (I) , Voltammetric sensor , Screen printed electrode , La3+ , ZnO nanoflower
چكيده فارسي :
Sudan azo dyes, include Sudan (I–IV), are synthetic chemical colorants and traditionally used in industrial products [1]. In the past few years, Sudan dyes, especially, Sudan (I) is also found used as an additive in foods, such as hot chili powder, relishes, chutneys, seasonings, sauces, and ready meals because of their bright and vivid red color [2]. However, Sudan (I) was recognized as a potential carcinogen to both human beings and animals which was demonstrated through laboratory experiments and thus was classified as a category 3 carcinogen by the International Agency for Research on Cancer (IARC) [3] Therefore, the use of Sudan (I) as food additive is forbidden all over the world. To this end, it is of great importance to develop a sensitive, rapid and reliable method for the determination of Sudan (I) in foodstuffs. This article reports on a sensitive detection method for Sudan (I) based on La3+/ZnO nanoflower modified graphite screen printed electrode (La3+/ZnO/SPE) by differential pulse voltammetry (DPV). The La3+/ZnO/SPE displayed good analytical performance for the measurement of Sudan (I). Under the optimum experimental conditions, Sudan (I) could be linearly detected in the wide concentration range of 3.0×10-7 to 4.0×10-4 M with a high sensitivity of 0.0975 μAmM-1. The detection limit was down to around 2.44×10-9 M (S/N = 3). Finally, the method was successfully applied for the determination of Sudan (I) in real samples.
