Microdetermination of organic compounds concerned in destructive phenols in industrial waste water is studied in this paper Spectrophotometry was used for the analysis of hydroquinone The hydroquinone could react with sodium phosphotungstate to form a blue complex in the treatment process of waste water containing phenol by photoelectrocatalytic degradation method The affecting factors were discussed and the optimum parameters were obtained The absorbance of the colored product was measured at 745*#nm, 20*#℃～25*#℃ with pH value of 8～10 and the amount of indicator (sodium phosphotungstate) of 5*#ml for 5*#min The hydroquinone could be determined in the presence of other middle products, such as phenol, benzoquinone and maleic anhydride The recovery of hydroquinone was in range from 958% to 1013% and relative standard deviation was less than 39% It proves to be a practical way for easy analysis of hydroquinone in enviroment monitoring with the advantages of application of relatively simple apparatus, small amount of sample, and rapid and convenient
Several Ti supported oxide anodic materials are prepared by thermal decomposition method and the anodic kinetic parameters ( a,b,i 0) are determined in 1 mol/L H 2SO 4 solution. The SEM photographs of the electrodes are scanned and saved as a BMP image file, from which a three dimensional space with graph and grey scale is obtained. Then the fractal dimension of the electrodes is calculated by using the formula D B( F ) =log N δ(F )/-log δ and a calculation program. The electrocatalytic performance of the electrodes is discussed combining with the fractal dimension and kinetic parameters. The influences of the electrode composition on the kinetic parameters are also discussed according to the dual barrier model and mechanism of the oxygen evolution at oxide anodes. The results show that the larger fractal dimension of the electrodes is, the better electrocatalytic activity is.
