Abstract：
:This work developed an analytical method to differentiate conventional and omega-3 fat acids enriched eggs by Raman spectroscopy and multivariate supervised classification with Partial Least Squares Discriminant Analysis (PLS-DA). Forty samples of enriched eggs and forty samples of different types of common eggs from different batches were used to build the model. Firstly, gas chromatography was employed to analyze fatty acid profiles in egg samples. Raman spectra of the yolk extracts were recorded in the range from 3100 to 990 cm-1. PLS-DA model was able to correctly classify samples with nearly 100% success rate. This model was validated estimating appropriate figures of merit. Predictions uncertainties were also estimated by bootstrap resampling. The most discriminant Raman modes were identified based on VIP (variables importance in projection) scores. This method has potential to assist food industries and regulatory agencies for food quality control, allowing detecting frauds and enabling faster and reliable analyzes.
journal_name
Food Chemjournal_title
Food chemistryauthors
de Oliveira Mendes T,Porto BLS,Almeida MR,Fantini C,Sena MMdoi
10.1016/j.foodchem.2017.12.084subject
Has Abstractpub_date
2019-02-01 00:00:00pages
144-150eissn
0308-8146issn
1873-7072pii
S0308-8146(17)32055-1journal_volume
273pub_type
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