Discrimination of Atlantic salmon origins using untargeted chemical fingerprinting

Wen Hsin Chang, Yee Soon Ling, Ko Chih Wang, Fan Hua Nan, Wen Ling Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Mislabelling the geographic origin of same-species aquaculture products is difficult to identify. This study applied untargeted small-molecule fingerprinting to discriminating between Atlantic salmon originating from Chile and Norway. The acquired liquid chromatography-high-resolution mass spectrometry data from Chilean (n = 32) and Norwegian (n = 29) salmon were chemometrically processed. The partial least squares discriminant analysis (PLS-DA) models successfully discriminated between Chilean and Norwegian salmon at both positive and negative ionisation modes (R2 > 0.96, Q2 > 0.81). Univariate analyses facilitated the selection of approximately 100 candidate markers with high statistical confidence (> 95%). Of these, 37 confirmed markers of Chilean and Norwegian salmon were primarily associated with feed formulations, including lipid derivatives and feed additives. None of the markers were residues or contaminants of potential food safety concern.

Original languageEnglish
Article number133538
JournalFood Chemistry
Publication statusPublished - 2022 Nov 15


  • Atlantic salmon
  • Chemical fingerprints
  • Geographic origin
  • High-resolution mass spectrometry
  • Untargeted analysis

ASJC Scopus subject areas

  • Analytical Chemistry
  • Food Science


Dive into the research topics of 'Discrimination of Atlantic salmon origins using untargeted chemical fingerprinting'. Together they form a unique fingerprint.

Cite this