Evaluation of the multi-element capabilities of collision/reaction cell inductively coupled plasma-mass spectrometry in wine analysis

TALANTA

卷:128

Article

Grindlay, Guillermo^1,2  Mora, Juan¹  de Loos-Vollebregt, Margaretha T. C.^2,3  Vanhaecke, Frank¹ 

[1] Univ Alicante, Dept Analyt Chem Nutr & Food Sci, E-03080 Alicante, Spain

[2] Univ Ghent, Dept Analyt Chem, B-9000 Ghent, Belgium

[3] Delft Univ Technol, Fac Appl Sci Analyt Biotechnol, NL-2628 BC Delft, Netherlands

关键词: Spectral interference;    Collision/reaction cell;    ICP-MS;    Multi-element analysis;    Wine;   

DOI  :  10.1016/j.talanta.2014.05.008

来源: Elsevier

【 摘 要 】

This work explores the multi-element capabilities of inductively coupled plasma-mass spectrometry with collision/reaction cell technology (CCT-ICP-MS) for the simultaneous determination of both spectrally interfered and non-interfered nuclides in wine samples using a single set of experimental conditions. The influence of the cell gas type (i.e. He, He+H-2 and He+NH3), cell gas flow rate and sample pre-treatment (i.e. water dilution or acid digestion) on the background-equivalent concentration (BEC) of several nuclides covering the mass range from 7 to 238 u has been studied. Results obtained in this work show that, operating the collision/reaction cell with a compromise cell gas flow rate (i.e. 4 mL min(-1)) improves BEC values for interfered nuclides without a significant effect on the BECs for non-interfered nuclides, with the exception of the light elements Li and Be. Among the different cell gas mixtures tested, the use of He or He+H-2 is preferred over He+NH3 because NH3 generates new spectral interferences. No significant influence of the sample pre-treatment methodology (i.e. dilution or digestion) on the multi-element capabilities of CCT-ICP-MS in the context of simultaneous analysis of interfered and non-interfered nuclides was observed. Nonetheless, sample dilution should be kept at minimum to ensure that light nuclides could be quantified in wine. Finally, a direct 5-fold aqueous dilution is recommended for the simultaneous trace and ultra-trace determination of spectrally interfered and non-interfered elements in wine by means of CCT-ICP-MS. The use of the CCT is mandatory for interference-free ultra-trace determination of Ti and Cr. Only Be could not be determined when using the CCT due to a deteriorated limit of detection when compared to conventional ICP-MS. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free