A comparative study of the content of heavy metals in oils:

Overview

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Key numbers

The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:

• estimated that about 80% of the daily dose of heavy metals enters the human body through the consumption of
• are valuable nutrients in the human diet (Krzymański 2009). The presence of heavy metals in vegetable oils may cause
• Tables 1–3 present the study results for the analyzed consumers (Zioła-Frankowska et al. 2011).
• Table 1. The concentration of heavy metals in the productions fractions of rapeseed oil
• The selected analytical procedure allows to obtain repeatable Metrologia, 1–2, pp. 79–84. (in Polish)
• Angelova, V., Ivanova, R. & Ivanov, K. (2005). Heavy metal vegetable oils consumed in China, Food and Chemical
• Corley, R.H.V. (2009). How much palm oil do we need?, Environmental Determination of heavy metals in vegetable oils, Laboratorium,
• zagrożenie dla zdrowia i życia ludzkiego. Przyjmuje się, że około 80% codziennej dawki dostaje się do organizmu

Methods (brief)

• heavy metals (Juszczak 2008). Additionally, raw material can Sample preparation for analysis
• also be contaminated with metals in the production process. Samples obtained from the producer were stored in polyethylene
• iron and manganese in edible oil samples including rapeseed, Sample preparation
• soybean and linseed oils, and (2) to determine the variation in The samples were prepared on the basis of the modified procedure
• Materials and methods authors (Szyczewski et al. 2015). A sample of 10 g was placed
• Edible oil production Then the incinerated sample was dissolved in nitric acid (V)
• In the first stage of refining oil, pressed raw oil (1st fraction) is and vaporized in a muffle furnace. At the end the sample was
• of oil during hot pressing in worm presses. The byproducts of an atomic absorption spectrometer with acetylene-air flame
• the oil processing, including its further stages, are pomace atomization (F-AAS). A fast sequential atomic absorption
• the production process toxic substances – not only heavy The test was repeated three times for each sample.
• metals – are transferred to pomace and dried distiller’s grain At the sample preparation stage the following instruments
• concentrations of metals in comparison to the 2nd fraction. commercial standards for AAS (Merck, Darmstadt, Germany).
• the removal of dyes such as chlorophyll, anthocyains and to mineralization and digestion in a porcelain melting pot and
• especially to the chlorophyll dyes, which, apart from the pot for the preparation of oil samples gives the most accurate
• cultivation and they differ in terms of seed fatty acid content product were shown for the samples from the first stage
• al. 2010, Saastamoinen et al. 2010). The highest concentrations fractions. The concentrations of other analyzed heavy metals
• the linseed by the highest concentrations of copper, manganese every analyzed sample were slightly higher.
• last fraction (Wroniak et al. 2006). Moreover, the concentration Investigation of the levels of some element in edible oil samples

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

Wiki pages this source may touch

• Fish — marine, non-predatory (sardines, anchovies, salmon, cod)
• Other cooking oils (canola, sunflower, coconut, avocado, sesame)
• Cadmium
• Lead
• Aluminum
• Tin
• Chromium

Verification notes

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Update history

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