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Issue 11, 2006
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The direct analysis of fuel ethanol by ICP-MS using a flow injection system coupled to an ultrasonic nebulizer for sample introduction

Tatiana D. Saint’Pierre,*a  Luciano Tormen,a  Vera L. A. Frescuraa  and  Adilson J. Curtiusa 
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* Corresponding authors

a Departamento de Química, Universidade Federal de Santa Catarina (UFSC), Florianópolis, Brazil
E-mail: tatiana@qmc.ufsc.br
Fax: +55-48-3331-6850
Tel: +55-48-3331-6841

Abstract

In this work, a method for the analysis of fuel ethanol by ICP-MS is proposed. The direct introduction of a 10% v/v ethanol solution through an ultrasonic nebulizer formed carbon deposits on the cones. Therefore, a flow injection system was used to introduce 250 μL of the diluted sample or calibration solution. The optimized operational conditions were 1200 W RF power, 0.7 L min−1 nebulizer gas flow rate and 140 °C and −3 °C heating and cooling temperatures of the USN desolvation system. External calibration against aqueous solutions, matrix matching and isotope dilution (ID) were compared. The limits of detection were, in μg L−1, Ag: 0.08, Cd: 0.12, Co: 0.04, Cu: 0.4, Fe: 27, Mn: 0.7, Ni: 0.4 and Pb: 0.2, with calibration against aqueous solutions, and Ag: 0.02, Cd: 0.02, Cu: 0.2 and Pb: 0.04, with isotope dilution. Matrix matching was not recommended because of the carbon deposits formation. Both ID and calibration with aqueous solutions promoted speed, good precision, sensitivity and agreement with the results obtained by ETV-ICP-MS.

Graphical abstract: The direct analysis of fuel ethanol by ICP-MS using a flow injection system coupled to an ultrasonic nebulizer for sample introduction

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Publication details

The article was received on 12 May 2006, accepted on 20 Jul 2006 and first published on 14 Aug 2006


Article type: Technical Note
DOI: 10.1039/B606790E
Citation: J. Anal. At. Spectrom., 2006,21, 1340-1344
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    The direct analysis of fuel ethanol by ICP-MS using a flow injection system coupled to an ultrasonic nebulizer for sample introduction

    T. D. Saint’Pierre, L. Tormen, V. L. A. Frescura and A. J. Curtius, J. Anal. At. Spectrom., 2006, 21, 1340
    DOI: 10.1039/B606790E

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