Determination of cadmium and lead in edible oils by electrothermal atomic absorption spectrometry after reverse dispersive liquid-liquid microextraction
Abstract
The dispersive liquid-liquid microextraction of edible oils with a low volume of an acidic solution in the presence of isopropyl alcohol allows cadmium and lead to be completely separated into the aqueous phase. After centrifugation, the metals are determined by electrothermal atomization atomic absorption spectrometry using a palladium salt for chemical modification in the heating cycle. Using a 10 g oil sample, the enrichment factor is 140, which permits detection limits of 0.6 and 10 ng kg(-1) for cadmium and lead, respectively. The results agree with those obtained after sample mineralization. Data for the cadmium and lead levels for 15 samples of different characteristics are given.
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The accuracy of the method was evaluated through a recovery experiment by spiking samples at two levels or by comparing results with an independent sample preparation method [11].
“The accuracy of the method was evaluated through a recovery experiment by spiking the samples at two levels or comparing the results with the data obtained by an independent sample preparation method [11].”
The accurate determination of lead is an important issue in analytical chemistry because of very low concentrations in some samples and matrix interference in real samples.
“Therefore, the accurate determination of lead is an important issue in analytical chemistry because of the very low concentrations in some samples as well as the presence of a matrix in real samples, which may interfere with instrumental determination [15,16,17].”
From Deep Eutectic Solvent-Based Microextraction of Lead(II) Traces from Water and Aqueous Extracts before FAAS Measurements (2020) · cites this paper as [17]
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References 42 · Cited by 87
- Authors
- López-García, I., Vicente-Martínez, Y., & Hernández-Córdoba, M.
- Venue
- Talanta
- Publisher
- Elsevier BV
- Published
- 2014-06
- Volume
- 124
- Pages
- 106-110
- ISSN
- 0039-9140 (ISSN-L)
- OpenAlex
- W2126587285
- Cited by
- 87
- References
- 42
- Citations by year
- 2026: 2 · 2025: 6 · 2024: 8 · 2023: 6 · 2022: 5 · 2021: 8 · 2020: 7 · 2019: 10 · 2018: 10 · 2017: 5 · 2016: 6 · 2015: 10 · 2014: 4
- FWCI
- 7.45
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Talanta (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Ministerio de Economía y Competitividad
- Comunidad Autónoma de la Región de Murcia
- Topics
- Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
- Physical Sciences › Chemistry › Spectroscopy › Analytical Chemistry and Chromatography
- Physical Sciences › Chemistry › Electrochemistry › Electrochemical Analysis and Applications
- Keywords
- cadmium, lead, edible oils, dispersive liquid-liquid microextraction, reverse extraction, graphite furnace atomic absorption spectrometry, metal contamination, food safety
- MeSH terms
- Acids, Cadmium, Fish Oils, Hot Temperature, Hydrogen-Ion Concentration, Lead, Oils, Palladium, Plant Oils, Solutions, Spectrophotometry, Atomic, Reproducibility of Results, 2-Propanol, Liquid Phase Microextraction
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