A disposable modified electrochemical sensor for the detection of heavy metals is described. Coupling this sensor with square wave stripping analysis, detection limit of 0.3ppb, 1ppb, 0.5ppb were found for lead(Ⅱ), cadmium(Ⅱ) and copper(Ⅱ) respectively. The main advantage of this device is the avoidance of mercury solution to perform stripping analysis.
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