Element fingerprinting of marine organisms by dynamic reaction cell inductively coupled plasma mass spectrometry |
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Authors: | Francesco Cubadda Andrea Raggi Ettore Coni |
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Institution: | (1) National Centre for Food Quality and Risk Assessment, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy |
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Abstract: | A method for the determination of sixteen elements (Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Mo, Ni, Pb, Se, Sn, V, Zn) in seafood
by dynamic reaction cell inductively coupled plasma mass spectrometry (ICP–DRC–MS) is presented. A preliminary study of polyatomic
interferences was carried out in relation to the chemical composition of marine organisms belonging to different taxa. Acid
effects and other matrix effects in marine organisms submitted to closed-vessel microwave digestion were investigated as well.
Ammonia was the reactive gas used in the DRC to remove polyatomic ions interfering with 27Al, 52Cr, 56Fe and 51V. Optimal conditions for the simultaneous determination of analytes were identified in order to develop a fast multielement
method. A suite of real samples (mussels and various fish species) were used during method development along with three certified
reference materials: BCR CRM 278R (mussel tissue), BCR CRM 422 (cod muscle) and DORM-2 (dogfish muscle). The proposed analytical
approach can be used in conjunction with suitable chemometric procedures to address quality and safety issues in aquaculture
and fisheries. As an example, a case study is described in which mussels from three farming sites in the Venice Lagoon were
distinguished by multivariate analysis of element fingerprints.
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Keywords: | Dynamic reaction cell inductively coupled plasma mass spectrometry Seafood Multielement analysis Principal component analysis Discriminant analysis |
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