Abstract
An adsorptive stripping voltammetric method for the determination of the pesticide dinoseb (2-sec.-butyl-4,6-dinitrophenol) at the mercury film electrode is described. The deposition of the mercury film on a glassy carbon disk electrode was optimized. The temperature, at which the mercury film was deposited, was demonstrated to have a strong influence on the stripping peaks, the first one being much more intense than the second. A systematic study of the variables affecting the stripping response was carried out by differential pulse voltammetry. The results obtained have been compared with those at the HMDE; a significant improvement in the sensitivity of the method developed with the MFE was observed. Using a 300 s accumulation time, the limits of determination and detection were 3.6 × 10−10 and 1.1 × 10−10 mol L−1, respectively. The effect of the presence of several herbicides on the dinoseb response was also tested. The method has been applied to the determination of the pesticide in spiked apple juice at two concentration levels: 12.0 and 1.2 μg L−1 of juice.
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Pedrero, M., Casado, B., de Villena, F.J.M. et al. Determination of dinoseb by adsorptive stripping voltammetry using a mercury film electrode. Fresenius J Anal Chem 349, 546–551 (1994). https://doi.org/10.1007/BF00323992
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DOI: https://doi.org/10.1007/BF00323992