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- W2364902652 abstract "A new paste carbon electrode chemically modified with morin was fabricated and used as the working electrode in the adsorptive stripping voltammetric determination of traces of lead in human urine. An electroactive complex was formed between Pb(Ⅱ) ion and morin which was modified on the surface of the electrode, and the complex was adsorbed and concentrated on the electrode in a sodium formate HCl buffer medium of pH 4.9 and at -0.10V ( vs. SCE) under stirring. After standing for 40s at -0.85V ( vs. SCE), the lead(Ⅱ) accumulated on the electrode was reduced, upon anodic linear scanning, a sensitive, second derivative stripping peak was observed at -0.43V ( vs. SCE). Linear relationships were obtained in the concentration ranges 5×10 -9 ～1.0×10 -7 mol·L -1 and 2×10 -8 ～1.0×10 -6 mol·L -1 of lead(Ⅱ) for preconcentration for 360s and 180s respectively. A limit of detection of 1.0×10 -9 mol·L -1 ( S/N =3) was obtained when preconcentrated for 360s. A brief discussion was also given on the mechanism of the electrode reaction. Satisfactory results were obtained in the analysis of human urine." @default.
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- W2364902652 date "2002-01-01" @default.
- W2364902652 modified "2023-09-25" @default.
- W2364902652 title "DETERMINATION OF TRACE AMOUNTS OF LEAD IN HUMAN URINE BY ADSORPTIVE-STRIPPING VOLTAMMETRY WITH PASTE CARBON ELECTRODE CHEMICALLY MODIFIED WITH MORIN" @default.
- W2364902652 hasPublicationYear "2002" @default.
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