Determination of trace amounts of lead by adsorptive cathodic stripping voltammetry with L-3-(3,4-Dihydroxyphenyl)alanine
2009 ◽
Vol 74
(4)
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pp. 599-610
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Keyword(s):
A sensitive and selective procedure is presented for the voltammetric determination of lead. The procedure involves an adsorptive accumulation of lead L-3-(3,4-dihydroxyphenyl)alanine (LDOPA) on a hanging mercury drop electrode, followed by a stripping voltammetric measurement of reduction current of an adsorbed complex at –0.15 V (vs Ag|AgCl). Optimum conditions for lead analysis include pH 8.5, 80 μM LDOPA and accumulation potential –0.15 V (vs Ag|AgCl). The peak currents are proportional to the lead concentration 1–300 nmol l–1 with a detection limit of 0.6 nmol l–1 and accumulation time 60 s. The method was used for the determination of lead in blood, dry tea and also in waters.
2013 ◽
Vol 78
(5)
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pp. 717-724
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2013 ◽
Vol 13
(3)
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pp. 236-241
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2014 ◽
Vol 2
(6)
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pp. 691-700
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1987 ◽
Vol 60
◽
pp. 185-195
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