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Title: Study of analytical parameters of a differential pulse voltammetric method using chemically modified electrodes for lead analysis in water
Authors: Lazar, Ioana Georgiana 
Diacu, Elena 
Vasile, Gabriela 
Ungureanu, Eleonora-Mihaela 
Ivanov, Alexandru Anton 
Keywords: Stripping differential pulse voltammetry;Lead;Water quality;Method development;2,6-bis((E)-2- (thiophen-2-yl)vinyl)-4-(4,6,8-trimethylazulen-1-yl)pyrylium perchlorate
Issue Date: 2018
Publisher: SYSCOM 18 SRL
The development of a new voltammetric method for the determination of Pb2+ ions in water samples using
glassy carbon electrodes modified with 2,6-bis((E)-2-(thiophen-2-yl)vinyl)-4-(4,6,8-trimethylazulen-1-
yl)pyrylium perchlorate is here presented. The analytical parameters for differential pulse voltammetry
(DPV) were established and the method was applied for Pb2+ ions determination in acetate buffer solution
at pH 5.5. For the developed DPV method the linearity of calibration curve was set up between 20.71µg L-1
- 103.6µg L-1 with a good correlation coefficient R2=0.9988, the intermediate precision was calculated for
three lead concentrations:20, 60,100µg L-1.The obtained detection and quantification limits were 3.1µg L-1,
respectively 10.4µg L-1. An uncertainty budget was developed and the value of expanded uncertainty was
assessed. The optimized method was used to analyze Pb2+ ions from of water samples and good correlation
with standard method was obtained.
Revista de Chimie (Bucharest), vol. 69, no. 9, pp. 2311-2314
ISSN: 0034-7752
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