Electrothermal vaporization of mineral acid solutions in inductively coupled plasma mass spectrometry: comparison with sample nebulization

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Title: Electrothermal vaporization of mineral acid solutions in inductively coupled plasma mass spectrometry: comparison with sample nebulization
Authors: Mora, Juan | Gras, Luis | Veen, Eric H. van | Loos-Vollebregt, Margaretha T.C. de
Research Group/s: Espectrometría Atómica Analítica
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología | Delft University of Technology. Laboratory of Materials Science
Keywords: Acids | Electrothermal vaporization | Nebulization | Microwave desolvation | Spectral interferences | Modifier | Inductively coupled plasma mass spectrometry
Knowledge Area: Química Analítica
Issue Date: 7-Jun-1999
Publisher: Elsevier
Citation: MORA PASTOR, Juan, et al. “Electrothermal vaporization of mineral acid solutions in inductively coupled plasma mass spectrometry: comparison with sample nebulization”. Spectrochimica Acta Part B: Atomic Spectroscopy. Vol. 54, Issue 6 (14 June 1999). ISSN 0267-9477, pp. 959-974
Abstract: The analytical behaviour of an electrothermal vaporization (ETV) device for the introduction of mineral acid solutions in inductively coupled plasma mass spectrometry (ICP-MS) was evaluated. Water, nitric acid, hydrochloric acid, perchloric acid and sulphuric acid in concentrations within the 0.05–1.0 mol l−1 range were studied. For all the acids tested, increasing the acid concentration increases the ion signal and deteriorates the precision. The magnitude of the signal enhancement depends on the analyte and on the acid considered. Acid solutions give rise to ion signals that are between 2 and 10 times higher than those with water. Among the acids tested, sulphuric acid provides the highest signals. The addition of palladium reduces matrix effects due to the acids and increases the signal in ETV ICP-MS. In comparison with conventional sample nebulization (CS), the ETV sample introduction system provides higher sensitivities (between 2 and 20 times higher) at the same acid concentration. The magnitude of this improvement is similar to that obtained with a microwave desolvation system (MWDS). The ETV sample introduction system gives rise to the lowest background signals from matrix-induced species. Due to this fact, the limits of detection (LODs) obtained for the isotopes affected by any interference are lower for ETV sample introduction than those obtained with the CS and the MWDS. For the isotopes that do not suffer from matrix-induced spectral interferences, the ETV gives rise to LODs higher than those obtained with the CS. For these isotopes the lowest LODs are obtained with MWDS.
URI: http://hdl.handle.net/10045/13620
ISSN: 0584-8547 (Print) | 1873-3565 (Online)
DOI: 10.1016/S0584-8547(99)00029-4
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/S0584-8547(99)00029-4
Appears in Collections:INV - GEAA - Artículos de Revistas

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