Abstract：
This study describes the development of 2-hydrazinobenzothiazole modified-amide/imide co-polymers for the extraction/pre-concentration of trace As(III), from edible vegetable oils. Their characterization was realized by help of instrumental techniques. The method is based on pH-dependent complexation between As(III) and co-polymeric chelators in presence of 35-fold excess As(V), their selective extraction into the mixed micellar phase, and detected at pH 2.0 and 6.0 by UV-vis spectrophotometer. The variables affecting extraction efficiency were optimized. From pre-concentration of 20-mL sample, the good linear relationships were obtained in range of 1-40 and 3-75 µg/L with DLs of 0.32 and 1.00 µg/L. The accuracy was verified by analysis of a certified sample without and with spiking. The method was applied into the analysis of iAs levels of samples. The results show that the functional co-polymers are efficient chelators, and exhibit great potential for the selective extraction of As(III) from edible vegetable oils.
摘要：
这项研究描述了2-肼基苯并噻唑改性的酰胺/酰亚胺共聚物的开发，用于萃取/预浓缩痕量As（III），从食用植物油。它们的表征是通过仪器技术实现的。该方法基于在35倍过量的As（V）存在下，As（III）和共聚螯合剂之间的pH依赖性络合，它们选择性地提取到混合胶束相中，并通过紫外可见分光光度计在pH2.0和6.0下检测。优化了影响提取效率的变量。从20毫升样品的预浓缩中，在1-40和3-75µg/L的范围内具有良好的线性关系，DL为0.32和1.00µg/L。通过分析没有加标和有加标的认证样品来验证准确性。将该方法应用于样品的iAs水平分析。结果表明，该功能共聚物是有效的螯合剂，并显示出从食用植物油中选择性提取As（III）的巨大潜力。
