a7b1a29961b8fb2dad08c623a2b06bc4 pmc_9100626.pdf f00e8450959643ba4329732fabab8061e4d6a85f pmc_9100626.pdf d8d8f7e1a67f16255c4f42671a538d317915c7ab03d212744ab9171fcf412e14 pmc_9100626.pdf Title: Spectroscopic and Thermal Characterization of Extra Virgin Olive Oil Adulterated with Edible Oils Subject: The substitution of extra virgin olive oil with other edible oils is the primary method for fraud in the olive-oil industry. Developing inexpensive analytical methods for confirming the quality and authenticity of olive oils is a major strategy towards combatting food fraud. Current methods used to detect such adulterations require complicated time- and resource-intensive preparation steps. In this work, a comparative study incorporating Raman and infrared spectroscopies, photoluminescence, and thermal-conductivity measurements of different sets of adulterated olive oils is presented. The potential of each characterization technique to detect traces of adulteration in extra virgin olive oils is evaluated. Concentrations of adulterant on the order of 5% can be detected in the Raman, infrared, and photoluminescence spectra. Small changes in thermal conductivity were also found for varying amounts of adulterants. While each of these techniques may individually be unable to identify impurity adulterants, the combination of these techniques together provides a holistic approach to validate the purity and authenticity of olive oils. Keywords: edible oils; Raman; photoluminescence; FTIR; thermal conductivity; PCA; 2DCOS Author: Emigdio Chavez-Angel, Blanca Puertas, Martin Kreuzer, Robert Soliva Fortuny, Ryan C. Ng, Alejandro Castro-Alvarez and Clivia M. Sotomayor Torres Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Thu May 5 05:42:02 2022 CEST ModDate: Thu May 5 05:48:56 2022 CEST Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 13 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 2830463 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- EOGSBQ+VnURWPalladioL Type 1 Custom yes yes no 10 0 AQDXWS+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 NHUJOH+URWPalladioL-Roma Type 1 Custom yes yes no 20 0 NTXJIK+URWPalladioL-Ital Type 1 Custom yes yes no 24 0 XBNVAE+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 42 0 TRSMUE+CMSY10 Type 1 Builtin yes yes no 64 0 QGSPAQ+PazoMath Type 1 Builtin yes yes no 71 0 GIGFZE+CMR10 Type 1 Builtin yes yes no 75 0 SNDOSI+PazoMath-Italic Type 1 Builtin yes yes no 79 0 RTNGES+CMEX10 Type 1 Builtin yes yes no 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edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@13c27452 Item: Title: Thermal Conductivities Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@262b2c86 Item: Title: Discussion Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@371a67ec Item: Title: References Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@5ed828d Info: Title: Spectroscopic and Thermal Characterization of Extra Virgin Olive Oil Adulterated with Edible Oils Author: Emigdio Chavez-Angel, Blanca Puertas, Martin Kreuzer, Robert Soliva Fortuny, Ryan C. Ng, Alejandro Castro-Alvarez and Clivia M. Sotomayor Torres Subject: The substitution of extra virgin olive oil with other edible oils is the primary method for fraud in the olive-oil industry. Developing inexpensive analytical methods for confirming the quality and authenticity of olive oils is a major strategy towards combatting food fraud. Current methods used to detect such adulterations require complicated time- and resource-intensive preparation steps. In this work, a comparative study incorporating Raman and infrared spectroscopies, photoluminescence, and thermal-conductivity measurements of different sets of adulterated olive oils is presented. The potential of each characterization technique to detect traces of adulteration in extra virgin olive oils is evaluated. Concentrations of adulterant on the order of 5% can be detected in the Raman, infrared, and photoluminescence spectra. Small changes in thermal conductivity were also found for varying amounts of adulterants. While each of these techniques may individually be unable to identify impurity adulterants, the combination of these techniques together provides a holistic approach to validate the purity and authenticity of olive oils. 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