Voltammetric determination of MCPA, 4-chloro-o-cresol and o-cresol in water using a modified carbon paste electrode

Voltammetric method with use of modified carbon paste electrodes was applied to determining of MCPA herbicide, 4-chloro-o-cresol and o-cresol in water. All these compounds can be present in waste-water from production of MCPA or in river water. Carbon paste electrode was modified with mesoporous silica SBA-15 or powdered activated carbon Norit SX-2. The results showed that limit of detection for MCPA was 0.7 mu mol L-1 and 1.3 mu mol L-1 for Norit SX-2 and SBA-15, respectively. The smaller values of LOD for activated carbon were observed for other applied analytes. The electrode modified by this material used for determination of MCPA was better than electrodes in other works.