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Polypyrrole/carbonaceous nanospheres (PPy/CNSs) were synthesized for the first time and exactly employed in the selective detection for Hg(II) and Pb(II) on the modified screen-printed electrode under ultra-low concentration. The method is based on the selective adsorption of PPy/CNSs toward heavy metal ions. With both of the advantages of CNSs and PPy in electrochemical detecting, excellent sensitivity...
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