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Determination of trace elements in edible vegetable oils by atomic absorption spectrophotometry
Abstract
Methods are described for the direct determination of Al, Cr, Cu, Fe, Ni and Pb by atomic absorption spectrophotometry in sunflower oil and olive oils. Metallic contamination after storage under different controlled conditions and in contact with carbon steel, austenitic steel, ferritic steel and aluminum was examined. Additionally, chemical characteristics related to quality (acid value, peroxide value, K270 and oxidative stability) and some physical parameters of interest were evaluated after storage. When the samples were atomized directly off the tube wall, matrix interferences were not observed in the determination of Cr, Cu, Ni and Pb, whereas such interferences were noted when Al and Fe were determined. The results indicated that the L'Vov platform for Al and Fe determinations eliminates the matrix effects. Contamination with Fe was only detected in the olive oil that had been in contact with carbon steel, Fe concentration increased from 120±12 to 3,520±157 ppb. The physicochemical characteristics were affected only by the storage conditions, regardless of the metal sheets with which they were in contact. Virgin olive oil showed lowered stability after storage in contact with a carbon‐steel sheet than when stored in absence of metal.
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Direct determination of trace metals in oils by atomic spectroscopic techniques is difficult due to high viscosity and high organic contents of oils.
“However, direct determination of trace metals in oils by AS is dif fi cult due to high viscosity and high organic contents of oils [13,14].”
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Karimi, M., Dadfarnia, S., Shabani, A. M. H., Tamaddon, F., & Azadi, D. (2015) · Talanta · doi:10.1016/j.talanta.2015.07.021 · Cited by 182
Metadata
- Authors
- Martín‐Polvillo, M., Albi, T., & Guinda, A.
- Affiliations
- Instituto de la Grasa (ES)
- Instituto de la Grasa y sus Derivados Avda. Padre García Tejero, 4 Sevilla 41012 Spain
- Venue
- Journal of the American Oil Chemists' Society
- Publisher
- Wiley
- Published
- 1994-04
- Volume
- 71
- Issue
- 4
- Pages
- 347-353
- ISSN
- 0003-021X (ISSN-L)
- 1558-9331
- OpenAlex
- W2004714066
- Cited by
- 64
- References
- 0
- Citations by year
- 2023: 1 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 3 · 2014: 1 · 2013: 2 · 2012: 4
- FWCI
- 0.98
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Oil Chemists Society (publishedVersion)
- Topics
- Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
- Physical Sciences › Chemistry › Organic Chemistry › Edible Oils Quality and Analysis
- Physical Sciences › Chemistry › Analytical Chemistry › Heavy Metals in Plants
- Keywords
- trace elements, edible vegetable oils, sunflower oil, olive oil, virgin olive oil, metal contamination, storage conditions, metal containers, carbon steel, aluminum containers, matrix effects, L'vov platform, oxidative stability, peroxide value, acid value, lead, iron, copper, nickel, chromium, aluminum
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