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 development of a rapid method of anodic stripping voltammetry (ASV) coupled with experimental design for simultaneous determination of Zn²⁺, Cd²⁺, Pb²⁺, and Cu²⁺ in gasoline samples.
Researchers also developed a microwave assisted gasoline digestion procedure for sample preparation. The determination limit was found 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⁺. It was found that the interferences of concomitant metal ions were negligible. Gasoline samples collected in the city of São Luis (MA), Brazil were analyzed using this developed method, and the results demonstrated that this method was reliable and accurate.Full Text Source (Subscription or Fee): http://www.sciencedirect.com/science/article/pii/S0016236111003334