Mercury, dithiocarbamate complexes applications

Examples of applications involving preconcentration may be found in references (79-85). Modified electrodes capable of preconcentrating the analyte onto the electrode surface have been employed to enhance the analytical sensitivity and selectivity. The most common applications appear to be in the area of metal analysis. Preconcentration has been achieved on the basis of electrostatic attraction for analysis of chromium as Cr207" (78). For more selective preconcentration, however, complexation has been employed (79-81). Dimethylglyoxime has been employed for nickel determinations (81), and dithiocarbamates (79, 80, 82, 83) for copper determination. Dithiocarba-mate modified electrodes have been used for mercury analysis (84, 85). 

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