Overview
This study measured Zn, Pb, Mn, Cd, and Cu in carrot, potato, and onion after different cooking or processing treatments. It is useful as processing-context evidence, but several reported values are unusually high and should be routed with the verification caveat below.
Key numbers
- The authors state that lead was the highest heavy metal among all investigated samples.
- For carrot, the discussion reports Cd ranging from 19 to 22 mg/kg across treatments.
- Boiled carrot had the highest reported lead value, 73.8 mg/kg; sous-vide carrot lead was reported as 1.3 times lower.
- The paper reports the highest Zn, Pb, and Mn in boiled carrot, the highest Cd in sous-vide carrot, and the highest Cu in steamed carrot.
- Health-risk index values noted in the text included potato Cd HRI of 6.8-7.1 and potato Pb HRI of 3.4-4.9.
Methods
The paper compares processing treatments for vegetable matrices rather than surveying retail batches. Values are preserved as reported by the authors.
Implications
The source can support processing-context discussion for carrots, potatoes, and onions, especially where cooking state changes measured concentrations. It should not be pooled into ordinary raw-market benchmark distributions without resolving the unusually high reported values and the preparation basis.
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Verification notes
The lead and cadmium concentrations reported for some processed vegetables are high enough to warrant C-tier handling. This is not escalated because the source itself provides extractable values and the appropriate repository action is cautious routing, not a human-only decision.
Update history
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