Anodic stripping voltammetry coupled with design of experiments for simultaneous determination of Zn+2, Cu+2, Pb+2, and Cd+2 in gasoline

Fuel, Volume 91, Issue 1, January 2012, Pages 26–32
Anodic stripping voltammetry coupled with design of experiments for simultaneous determination of Zn+2, Cu+2, Pb+2, and Cd+2 in gasoline
Jemmla M. Trindade a, b, Lorena C. Martiniano a, c, Vivia R.A. Gonçalves c, Antonio G. Souza a, Aldaléa L.B. Marques c, Guintar L. Baugis d, Teresa C.O. Fonseca e, Chaojie Song c, Jiujun Zhang c, Edmar P. Marques b
a Pós-graduação em Química, CCEN-UFPB, João Pessoa, PB, Brazil
b Laboratório de Pesquisa em Química Analítica (LPQA), Departamento de Química, UFMA, São Luis, MA, Brazil
c Laboratório de Análises e Pesquisa em Química Analítica de Petróleo e Biocombustíveis (LAPQAP), Departamento de Tecnologia Química, UFMA, São Luis, MA, Brazil
d Petróleo Brasileiro S/A, Refinaria de Capuava – UN-RECAP, Av. Alberto Soares Sampaio, 2122-A, Parque Capuava, 09380-904 – Maua, SP, Brasil
e Centro de Pesquisa e Desenvolvimento Leopoldo Américo Miguêz de Mello, Diquim – CENPES / PETRÓLEO BRASILEIRO S/A – PETROBRAS Cidade Universitária, lha do Fundao, 21941-915 – Rio de Janeiro, RJ, Brasil
Abstract
Describes a rapid method of anodic stripping voltammetry (ASV) coupled with experimental design developed for simultaneous determination of Zn²⁺, Cd²⁺, Pb²⁺, and Cu²⁺ in gasoline samples. A microwave assisted gasoline digestion procedure for sample preparation was also established.
Researchers observed the determination limit to be 0.24 μg L⁻¹ for Zn²⁺; 8.58 × 10⁻⁴ μg L⁻¹ for Cd²⁺; 0.13 μg L⁻¹ for Pb²⁺, and 0.87 μg L⁻¹ for Cu²⁺. They obserbed that the interferences of concomitant metal ions were negligible. They analyzed gasoline samples collected in the city of São Luis (MA), Brazil the method.  Results showed that the method is reliable and accurate.
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