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- W2368488606 abstract "A novel method was described for the determination of ultra trace amounts of scandium by second derivation linear sweep voltammetry.A multi-walled carbon nanotubes modified carbon paste electrode is prepared and the adsorptive voltammetric behavior of scandium-calcium-alizarin red S (ABS)hetero-polynuclear complex has been studied in detail at the modified electrode.It was found that in a buffer solution of 0.08 mol/L glycine-0.04 mol/L potassium biphthalate at pH 3.6,the complex could be adsorbed on the surface of the electrode after accumulating at 0 mV for 90 s,yielding one sensitive stripping peak which results from the reduction of ABS in the complex at about -544 mV(vs.SCE) when scanning linearly from 0 mV to-1 000 mV at a scan rate of 200 mV/s.The second derivative peak height is proportional to the concentration of Sc in the range of 6.0×10-12-4.0×10-7 mol/L and the detection limit(S/N=3) was 4.0×10-12 mol/L(accumulation time for 180 s).The procedure was applied to the determination of trace amounts of scandium in ore samples,and the results were consistent with those obtained by ICP-AES." @default.
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- W2368488606 date "2009-01-01" @default.
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- W2368488606 title "Study on adsorption voltammetry of scandium-calcium-alizarin red S hetero-polynuclear complex at a multi-walled carbon nanotubes modified carbon paste electrode" @default.
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