Multi-element signature of cuttlefish and its potential for the discrimination of different geographical provenances and traceability

Food Chem. 2021 Sep 15:356:129687. doi: 10.1016/j.foodchem.2021.129687. Epub 2021 Mar 26.

Abstract

The measurement and analysis of fifty-two elements by quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS) and direct mercury analysis were applied to origin discrimination of Italian traditional cuttlefish (Chioggia, Venice lagoon) from Mediterranean and Atlantic samples. A total 68 specimens were analyzed in triplicates to generate 204 mass spectra profiles which were statistically processed by different chemometric techniques. Loading weights from principal component analysis as input for linear discriminant analysis (LW-LDA), stepwise-LDA (S-LDA) and variable influence of projection-partial least square discriminant analysis (VIP-PLS-DA) were used to classify samples while retaining the lowest possible number of key variables. VIP-PLS-DA was found to be the best variable selection-discriminant tool combo since the selected Na-Co-B-K-Cd-V-U-Rb-Ni-Ba-Cu-As-Sr-Mn-Mo-Li-Ca-Mg-Se-Bi-Cs-P-Y elemental pattern allowed the samples to be classified with 100% sensitivity, specificity and accuracy.

Keywords: Chemometrics; Element profiling; Fishery products; Geographical origin; ICP-MS.

MeSH terms

  • Animals
  • Decapodiformes / chemistry*
  • Decapodiformes / metabolism
  • Discriminant Analysis
  • Least-Squares Analysis
  • Mass Spectrometry / methods*
  • Mediterranean Region
  • Mercury / analysis
  • Microwaves
  • Principal Component Analysis
  • Trace Elements / analysis*
  • Trace Elements / chemistry

Substances

  • Trace Elements
  • Mercury