Ashing techniques in the determination of iron and copper in palm oil
Abstract
A modified method suitable for routine determination of iron and copper in palm oil was developed. The method involves all stages of ashing including charring, ashing and ash dissolution, using fabricated ashing vessels made of pyrex glass that can stand ashing temperatures of up to 700°C. The ashed samples were recovered quantitatively after refluxing with HNO3 and collected in the attached round‐bottomed flask readied for metals determination without transfer. The relative standard deviation for the determination of iron by flame atomic absorption was about 1.0%, whereas for copper determined by ion selective electrode it was about 0.5%.
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Decomposition of organic contents is a general pretreatment procedure for partial or complete removal of the matrix of edible oils, but it is time-consuming and there is no unique ashing procedure for all metals due to their reactivities and volatilities.
“Decomposition of organic contents is a general pretreatment procedure for partial or complete removal of the matrix of edible oils [19,20], but the process is time-consuming, and there is no unique ashing procedure for all metals due to their reactivates and volatilities.”
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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 · see citing works
- Authors
- Saleh, M. I., Murray, R. S., & Chin, C. N.
- Affiliations
- Universiti Sains Malaysia (MY)
- Venue
- Journal of the American Oil Chemists' Society
- Publisher
- Wiley
- Published
- 1988-11
- Volume
- 65
- Issue
- 11
- Pages
- 1767-1770
- ISSN
- 0003-021X (ISSN-L)
- 1558-9331
- OpenAlex
- W1974079733
- Cited by
- 20
- References
- 0
- Citations by year
- 2025: 1 · 2024: 1 · 2022: 1 · 2021: 2 · 2020: 2 · 2017: 2 · 2015: 3 · 2012: 2
- FWCI
- 0.56
- 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
- Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
- Keywords
- palm oil, iron determination, copper determination, char formation, flame atomic absorption spectrometry, ion-selective electrodes, trace metal analysis
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