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Comparative assessment of different coconut oils: Chromatographic and spectrometric analyses of pesticide residues, toxic heavy metals, and associated contents

The nutrients, toxic metals and pesticide levels of imported and local samples of coconut oil were determined using ICP-OES and HPLC following standard procedures. The imported coconut oil contains significantly higher levels of lead, cadmium, arsenic, nickel, aluminium and chromium (0.01-0.03 mg/kg) than the local samples (0.008-0.02 mg/kg). Nineteen pesticide residues were detected in the oil samples with varying levels ranging from 0.03 to 7.10 µg/kg oil. Interestingly, the levels of the toxic metals and pesticide residues were several folds lower compared to the FAO/WHO, EU and China limits (0.05-1.0 mg/kg). The essential amino acids, nutrient elements and vitamin profile levels were comparable to the WHO reference standards for dietary proteins. These findings suggest that coconut oil is nutritionally beneficial to human health. However, monitoring contamination of pesticide residues and toxic metals in imported coconut oil is crucial to avoid toxic health hazards due to bioaccumulation.

https://www.sciencedirect.com/science/article/pii/S2772275923000072

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