结合传统的喷壁式和薄层式安培检测器,制备了一种新型的喷壁/薄层安培检测器.联合高效液相色谱(HPLC)同时对5种环境优先污染酚进行了检测.实验发现,安培检测工作电极面积的增大会导致响应电流的增大,但同时也会增大噪声,因此,基于信噪比优化电极面积是重要的.选用色谱柱SHIM-PACKVP-ODS(150 mm ×4.6 mm),流动相V(甲醇)∶V(0.1 mol/L PBS,pH =7.5) =40∶60,柱温40℃,流速1 mL/min,进样量20 μL,安培检测电位为1.0V,紫外检测波长为220 nm,喷壁-薄层安培检测器不经富集对对硝基酚、苯酚、间甲酚、2,4-二氯苯酚和2,4,6-三氯苯酚共5种酚类物质的检测下限均低于1 μgL(S/N=3),优于相同条件下的紫外检测器和商品电化学检测器.用于实际水样分析亦获满意结果.
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