ANODIC STRIPPING VOLTAMMETRIC DETERMINATION OF LEAD USING A CHEMICALLY MODIFIED ELECTRODE BASED ON AZA CROWN ETHER

Segura, Rodrigo; Díaz, Karina; Pizarro, Jaime; Placencio, Alan; Tapia, Diego; Fajardo, Ángelo

dc.creator	Segura, Rodrigo
dc.creator	Díaz, Karina
dc.creator	Pizarro, Jaime
dc.creator	Placencio, Alan
dc.creator	Tapia, Diego
dc.creator	Fajardo, Ángelo
dc.date	2018-02-09
dc.date.accessioned	2019-11-13T15:11:38Z
dc.date.available	2019-11-13T15:11:38Z
dc.identifier	http://www.jcchems.com/index.php/JCCHEMS/article/view/466
dc.identifier.uri	https://revistaschilenas.uchile.cl/handle/2250/112644
dc.description	A glassy carbon electrode was modified by drop-coating technique using 1,4,10,13-Tetraoxa-7,16-diazaciclooctadecano (diaza-18 -crown-6 or DA18C6) and Nafion (NF) for the determination of Pb (II) by square wave anodic stripping voltammetric (SWASV). The new electrode exhibits an increase in due to major pre-concentration of aza crown ether and ionic exchange of NF with metal cations. Optimal conditions were: 3 mmol L-1 DA18C6, 3 wt % NF, 10 mmol L-1 HCl as supporting electrolyte, a frequency of 15 Hz , an accumulation time of 300 s and an accumulation potential of -0.80 V. The detection limit was 0.09 μg L-1 and linear range was 10-50 μg L-1. Interference from metal ions such us Fe (II), Pb (II), Cd (II) and Cu (II) was also studied. The method is sensitive, selective and simple with a relative standard deviation of 11%.	en-US
dc.format	application/pdf
dc.language	eng
dc.publisher	Sociedad Chilena de Química	en-US
dc.relation	http://www.jcchems.com/index.php/JCCHEMS/article/view/466/198
dc.rights	Copyright (c) 2018 Journal of the Chilean Chemical Society	en-US
dc.rights	https://creativecommons.org/licenses/by-nc-sa/4.0	en-US
dc.source	Journal of the Chilean Chemical Society; Vol 62 No 4 (2017): Journal of the Chilean Chemical Society	en-US
dc.source	0717-9707
dc.source	0717-9324
dc.subject	Aza crown ether	en-US
dc.subject	anodic stripping voltammetry	en-US
dc.subject	lead	en-US
dc.title	ANODIC STRIPPING VOLTAMMETRIC DETERMINATION OF LEAD USING A CHEMICALLY MODIFIED ELECTRODE BASED ON AZA CROWN ETHER	en-US
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion

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