Medical Laboratory Techniques, Vocational Higher School of Healthcare Studies, Mardin Artuklu University, Mardin, Turkey.
Department of Chemistry, Faculty of Arts and Science, University of Batman, Batman, Turkey.
Food Chem. 2018 Mar 1;242:533-537. doi: 10.1016/j.foodchem.2017.09.039. Epub 2017 Sep 9.
Hybrid nanostructures composed of γ-FeO (maghemite) and carboxylated-multi walled carbon nanotube (cMWCNT) were used for the magnetic solid phase extractions and determination of Sudan I, II, III, IV, Para Red, Sudan Black B and Sudan Red 7B in chili products. High performance liquid chromatography (HPLC) was employed for the measurements. Limit of quantification (LOQ) values were found in the range 0.44-2.82ngmL for analytes. The best extraction parameters were determined as pH 8.0, 40mg of magnetic nanoparticle, 4.0min of contact time, 0.3mL desorption by acetonitrile. The samples were dissolved in acetone-dichloromethane-methanol (3:2:1, v/v/v) and diluted with acetonitrile-methanol (v/v; 80:20) before the method was applied. Concentrations of Sudan dyes and Para Red were determined in four samples of chili powder from less than LOQ to 31.21±1.6ngg, two samples of chili tomato sauces (lower than LOQ) and two samples of ketchup (lower than LOQ).
由γ-FeO（磁赤铁矿）和羧基化多壁碳纳米管（cMWCNT）组成的杂化纳米结构被用于辣椒制品中苏丹红 I、II、III、IV、对位红、苏丹黑 B 和苏丹红 7B 的磁性固相萃取和测定。采用高效液相色谱法（HPLC）进行测量。分析物的定量限（LOQ）值在 0.44-2.82ngmL 范围内。确定的最佳萃取参数为 pH 8.0、40mg 磁性纳米颗粒、4.0min 接触时间、0.3mL 乙腈解吸。在应用该方法之前，将样品溶解在丙酮-二氯甲烷-甲醇（3:2:1，v/v/v）中，并用乙腈-甲醇（v/v；80:20）稀释。在四种来自辣椒粉的样品中，苏丹染料和对位红的浓度从低于 LOQ 到 31.21±1.6ngg 不等，两种番茄酱样品（低于 LOQ）和两种番茄酱样品（低于 LOQ）。
