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The differential potentiometric stripping analysis (DPSA) with Nafion coated carbon fibreelectrode has been studied, and a method to determine lead and cadmium in urine directly has beenattempted. The effect of various experimental parameters on the DPSA response is discussed.The experimental conditions include 0.2M sodium perchlorate, deposition potential of-1.0 or -1.1 Vand using 20 ppm mercuric ion as oxidizing agent. The response of the signal is in linear relationwith the concentrations of lead and cadmium respectively up to 0.5 ppm. The electrode coated withNafion film alleviates the interference from organics in urine samples.
The differential potentiometric stripping analysis (DPSA) with Nafion coated carbon fiblectrlectrode has been studied, and a method to determine lead and cadmium in urine directly has been been tempered. The effect of various experimental parameters on the DPSA response is discussed. sodium perchlorate, deposition potential of-1.0 or -1.1 Vand using 20 ppm mercuric ion as oxidizing agent. The response of the signal is in linear relation with the concentrations of lead and cadmium respectively up to 0.5 ppm. The electrode coated with Nafion film alleviates the interference from organics in urine samples.