固定化离子液体固相萃取-电化学联用测定痕量双酚A  

Supported Ionic Liquid Solid Phase Extraction Coupled to Electrochemical Detection for Determination of Trace Bisphenol A

作　　者：黄良樑 黄燕[1,2] 陈言凯[1,2,3] 丁云花[1,2] 张伟峰[1,2] 李小晶[4] 吴晓苹[1,2] 

机构地区：[1]食品安全分析与检测技术教育部重点实验室 [2]福州大学化学学院,福州350108 [3]福建省产品质量检验研究院,福州350002 [4]福建出入境检验检疫局技术中心,福州350001

出　　处：《分析化学》2015年第3期313-318,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.21375019);国家基础科学人才培养基金(No.J1103303);福建省科技厅重点项目(No.2011Y0038);国家质检总局科技计划项目(No.2013IK103)资助~~

摘　　要：以咪唑改性的苯乙烯型大孔树脂填料制备固相萃取小柱,进行固定化离子液体固相萃取,结合β-环糊精修饰离子液体碳糊电极,发展痕量双酚A的电化学联用快速检测技术。实验优化影响萃取效率的因素,获得最佳萃取条件（萃取填料用量0.4 g,样品体积200 m L,上样液p H 7.0,5 m L甲醇为洗脱溶剂,萃取流速4.5 m L/min）。测得固定化离子液体树脂对双酚A的最大吸附容量为10.1 mg/g,富集倍数为40倍。双酚A的浓度线性范围在2.3-228μg/L,检出限为0.95μg/L。联用方法灵敏、实用性强,用于实际样品中双酚A分析,结果与HPLC方法一致。A simple and green method for the determination of trace bisphenol A（ BPA） was established by coupling supported ionic liquid solid phase extraction to β-cyclodextrin modified ionic liquid carbon paste electrode-based electrochemical detection（ SILs-SPE-ED）. The synthesized imidazolium ionic liquid modified styrene type macroporous resin was used as adsorbent for SPE of BPA. The critical parameters that affect the extraction efficiency were optimized,including 0. 4 g of packing material quantity,200 m L of sample solution at p H 7. 0,5 m L of methanol as an eluent solvent,and 4. 5 m L / min of the SPE flow rate. Dynamic adsorption test showed that the maximum adsorption capacity of BPA on the SILs-SPE cartridge was 10. 1 mg / g,and the enrichment factor was 40. The calibration curve showed a good linearity between the anodic current and the BPA concentration in the range of 1. 0 ×10^-8-1. 0 ×10^-6mol / L（ i. e. 2. 3-228 μg / L）. The detection limit was4. 16 ×10^-9mol / L（ equal to 0. 95 μg / L）. The SILs-SPE-ED method was applied to the analysis of water and plastic samples and the results agreed well with HPLC method.

关 键 词：固定化离子液体 固相萃取 离子液体碳糊电极 双酚A 电化学检测 

分 类 号：TS206.4[轻工技术与工程—食品科学] O657.1[轻工技术与工程—食品科学与工程]