电致化学发光方法检测肉的新鲜度

肉类的变质过程中伴随着硫化物和氨气的产生.基于电致化学发光的原理和方法,构建了MWNTs/PVA/铱配合物修饰电极,此电极对无机氨有很好的响应,实验中以MWNTs/PVA/铱配合物修饰电极为工作电极,铂丝电极为对电极,Ag/AgCl电极为参比电极,进行循环伏安-电致化学发光扫描,扫描范围为0.2～1.8V,扫描速率为100 mv/s,线性范围为1.8×10-7～1.0×10-9 mol/L,检出限为1.2×10-13 mol/L.实验表明,ECL响应值与肉的腐败程度具有很好的相关性,该法可用于肉品新鲜度的监控.

The Electrochemiluminescent Method for Detection of Meat Freshness

It is companied by the production of sulfide and ammonia in the process of meat spoilage.The complex modified electrode assembled with MWNTs/PVA/(pq)2Ir(N-phMA) have a good response to inorganic ammonia,were developed on the base of the theory of electrochemiluminescence.In the experiment,the MWNTs/PVA/(pq)2Ir(N-phMA) electrode was used as a working electrodes,platinum wire electrode used as a counter electrode,and Ag / AgCl electrode as a reference electrode,to make for cyclic voltammetry-ECL scan.Scan range of 0.2 ~ 1.8V,scan rate of 100 mv/s,the linear range of 1.8×10-7 ~ 1.0×10-9 mol/L,the detection limit is 1.2×10-13 mol/L.With the range of 0.2 ~ 1.8V,the scan speed of 100 mv/s,the linear range of 1.8×10-7 ~ 1.0×10-9 mol/L.Experimental results show that the ECL response value have good correlation with the extent of meat corruption,and the method can be used to monitor the freshness of meat.