Study On Polymer Dye Modified Electrode For Detection Of Organic Pullutants

With a spatial three-dimensional structure,polymer modified electrode has advanced stability of the higher activity level and the larger electrochemical response signal. Three polymer modified electrodes were synthesized by the way of cyclic voltammetry. The polymer modified electrodes were applied to the analysis of organic pollutants.The poly-acid chrome blue K modified glassy carbon electrode was prepared by electropolymerization of acid chrome blue K on glassy carbon electrode. Three isomers of benzene two polyphenol at the pACBK/GC have been studied. The optimal conditions:0.1mol-L-1,pH6.8 phosphate buffer solution, the use of background subtraction of linear sweep voltammetry.Catechol in 1×10-5-7×10-4 mol·L-1 range, the correction equation for the Ipa=13.5+88568.6C, calibration equation was Ipa=4.79+33556.1C, regression coefficient was 0.994, the detection limit is 5×10-6 mol·L-1;resorcinol in 1×10-5-7×10-4 mol·L-1 range, the correction equation for the Ipa=2.03+12519.4C, regression coefficient was 0.996, the detection limit is 5×10-6 mol·L-1. The actual water samples have been determined and the satisfactory results have obtained.The poly-bromophenol blue modified glassy carbon electrode was prepared and studied the pBPB/GC by electrochemical methods. The redox of p-nitrophenol and m-nitrophenol at the pBPB/GC has been studied and the results show that the pBPB/GC exhibited excellent electro-catalytic properties and select properties. The optimal conditions:0.1mol-L"1, pH5.5 phosphate buffer solution, the use of background subtraction of linear sweep voltammetry. p- nitrophenol in 8×10-6-2×10-4mol-L-1 range, calibration equation was Ipc=-0.8675+0.2374C, regression coefficient was 0.994, the detection limit is 4x10-6 mol-L-1; m- nitrophenol in 8×10"6-2x10-4mol·L-1 range, the correction equation for the Ipc=-0.8783+0.3629C, regression coefficient was 0.998, the detection limit is 4×10-6 mol·L-1. The actual water samples have been determined and the satisfactory results have obtained.The poly-alizarin red modified glassy carbon electrode was prepared by electropolymerization of alizarin red on glassy carbon electrode. The pARS/GC was studied by electrochemical methods. The redox of hydroquinone isomers at the pARS/GC has been studied and the results show that the pARS/GC exhibited excellent electro-catalytic properties and select properties. The optimal conditions: 0.1 mol-L-1, Ph7.0 phosphate buffer solution, the use of background subtraction of linear sweep voltammetry. resorcinol in 2×10-5-5×10-4 range, calibration equation was Ipa=-5.929-0.8338C, regression coefficient was 0.996, the detection limit is 1×10-5 mol-L-1mol-L-1; catechol in 2×10"5-8×10-4 range, the correction equation for the Ipa=-3.651-0.3374C, regression coefficient was 0.996, the detection limit is 1×10-5 mol·L-1mol·L-1; Hydroquinone in 2×10-5-6.5×10-4 mol·L-1 range, the correction equation for the Ipa=-3.854-0.4783C, regression coefficient was 0.994, the detection limit is 1×10-5 mol·L-1. The actual water samples have been determined and the satisfactory results have obtained.