dc.creatorLara, Jesid
dc.creatorTorres, Juan F.
dc.creatorGarc?a-Beltr?n, Olimpo
dc.creatorNagles, Edgar
dc.creatorHurtado, John
dc.date2019-03-04T16:41:56Z
dc.date2019-03-04T16:41:56Z
dc.date2017-07-12
dc.date.accessioned2023-08-31T19:04:20Z
dc.date.available2023-08-31T19:04:20Z
dc.identifierLara, J., Torres, J. F., Beltr?n, O. G., Nagles, E., & Hurtado, J. (2017). Simultaneous determination of lead and cadmium by stripping voltammetry using in-situ mercury film glassy carbon electrode coated with nafion-macrocyclic ester. International Journal of Electrochemical Science, 12(8), 6920?6929.
dc.identifier1452-3981
dc.identifierhttp://www.electrochemsci.org/papers/vol12/120806920.pdf
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8555203
dc.descriptionThis work report a sensitive and selective anodic stripping method for the simultaneous determination of Pb(II) and Cd(II) using (3,10,18,25-tetraoxapentacyclo [25.3.1.112,16.04,9.0 19,24] dotriaconta1(31),4(9),5,7,12(32),13,15,19,21,23,27,29-dodecaene-2,11,17,26-tetrone) macrocyclic ester (L). Anodic peak currents were increased from 1.16 to 31.48 ?A for Pb(II) and 0.22 to 6.68 ?A for Cd(II) when the in-situ mercury film electrode was modified with nafion and (L). Moreover, potentials separation values for Cd-Pb shift from 150 to 190 mV. Optimal parameters such as: pH; L concentration (CL), mercury concentration (CHg), accumulation potential (EACC) and accumulation time (tACC) were pH 4.0 for Pb(II) and 5.0 for Cd(II) using phosphate buffer solution (PBS), CL 12.0 mmol L -1 , CHg 28.0 mg L-1 , EACC -1.0 V and tACC 60. Detection limits (DoL) were 0.085 and 0.80 ?g L-1 for Pb(II) and Cd(II) respectively. The relative standard deviation (RSD) for seven measurements of Pb(II) and Cd(II) 9.0 ?g L-1 were of 2.5 and 2.0% respectively. The method was validated by ICP multielement standard solution IX (Merck) containing As, Be, Cd, Cr(VI), Hg, Ni, Pb, Se and Tl 100 mg L1 . Finally, useful of the modified electrode was developed in the analysis of Pb(II) and Cd(II) using tap water samples
dc.languageen
dc.publisherInternational Journal of Electrochemical Sciences
dc.subjectMacrocyclic ester
dc.subjectStripping voltammetry
dc.subjectModified electrode
dc.subjectLead
dc.subjectCadmium
dc.titleSimultaneous Determination of Lead and Cadmium by Stripping Voltammetry Using in-situ Mercury Film Glassy Carbon Electrode Coated with Nafion-Macrocyclic Ester
dc.typeArticle


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