Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | DISSOLVED INORGANIC CARBON EFFECT IN THE DETERMINATION OF ARSENIC AND CHROMIUM IN MINERAL WATERS BY INDUCTIVELY COUPLED PLASMA-MASS SPECTROMETRY |
| Abstract | The analysis of some Italian mineral waters by ICP-MS has revealed errors in the determination of As and Cr in natural effervescent or carbonated waters due to the presence of dissolved inorganic carbon (DIC). This leads to overestimate As and Cr in 1% (v/v) HNO3 acidified samples, analysed within 1-2 h after the acidification. The overestimation of As concentration is caused by matrix interferences producing a signal enhancement due to the presence of dissolved inorganic carbon. This effect is analogous to that observed in the presence of organic carbon and occurs at millimolar DIC levels. The overestimation of Cr concentration is due to the (40)Ar(12)C(+) species interfering with (52)Cr(+) despite the use of the octopole reaction system. The optimization of the He flow in the collision cell can solve the latter problem, but the required increase in the flow rate decreases the sensitivity of the ICP-MS technique. The observed effects in CO2 rich mineral waters and artificial NaHCO3 solutions suggest that 5-10 mM DIC levels may affect the determination of As and Cr concentration in thermal waters, rivers, lakes and groundwaters. (C) 2007 Elsevier B.V. All rights reserved. |
| Source | Analytica chimica acta (Print) 599, pp. 191–198 |
| Keywords | Inductively coupled plasma-mass spectrometry matrix interferencesInorganic carbon signal enhancementAs and Cr analysisMineral and natural |
| Journal | Analytica chimica acta (Print) |
| Editor | Elsevier, Amsterdam, Paesi Bassi |
| Year | 2007 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.aca.2007.08.016 |
| Authors | PETTINE M.; CASENTINI B.; MASTROIANNI D.; CAPRI S. |
| Text | 42148 2007 10.1016/j.aca.2007.08.016 ISI Web of Science WOS 000250023000004 Inductively coupled plasma mass spectrometry matrix interferences Inorganic carbon signal enhancement As and Cr analysis Mineral and natural DISSOLVED INORGANIC CARBON EFFECT IN THE DETERMINATION OF ARSENIC AND CHROMIUM IN MINERAL WATERS BY INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY PETTINE M.; CASENTINI B.; MASTROIANNI D.; CAPRI S. Istituto di Ricerca sulle Acque The analysis of some Italian mineral waters by ICP MS has revealed errors in the determination of As and Cr in natural effervescent or carbonated waters due to the presence of dissolved inorganic carbon DIC . This leads to overestimate As and Cr in 1% v/v HNO3 acidified samples, analysed within 1 2 h after the acidification. The overestimation of As concentration is caused by matrix interferences producing a signal enhancement due to the presence of dissolved inorganic carbon. This effect is analogous to that observed in the presence of organic carbon and occurs at millimolar DIC levels. The overestimation of Cr concentration is due to the 40 Ar 12 C species interfering with 52 Cr despite the use of the octopole reaction system. The optimization of the He flow in the collision cell can solve the latter problem, but the required increase in the flow rate decreases the sensitivity of the ICP MS technique. The observed effects in CO2 rich mineral waters and artificial NaHCO3 solutions suggest that 5 10 mM DIC levels may affect the determination of As and Cr concentration in thermal waters, rivers, lakes and groundwaters. C 2007 Elsevier B.V. All rights reserved. 599 http //www.sciencedirect.com/science/article/pii/S0003267007013487 Articolo su rivista ISI ACA2007.pdf Articolo in rivista Elsevier 0003 2670 Analytica chimica acta Print Analytica chimica acta Print Anal. chim. acta Print Analytica chimica acta. Print barbara.casentini CASENTINI BARBARA maurizio.pettine PETTINE MAURIZIO silvio.capri CAPRI SILVIO domenico.mastroianni MASTROIANNI DOMENICO TA.P04.021.005 Tendenze evolutive della qualita dei corpi idrici superficiali e sotterranei correlazione causa effetto e caratterizzazione. |