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Gourmet Table Salts: The Mineral Composition Showdown
Eleonora Di Salvo1, Roberta Tardugno2, Vincenzo Nava1
1Departement of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98168 Messina, Italy.
Toxics
|August 25, 2023
Summary
Unrefined table salts contain varying essential and toxic trace elements. Lead exceeded safe levels in all tested salts, necessitating further health monitoring.
Area of Science:
- Food Science
- Analytical Chemistry
- Environmental Health
Background:
- Specialty table salts are gaining global demand as niche gastronomic products.
- Unrefined salts may contain potentially harmful or beneficial trace elements.
- Understanding mineral content is crucial for consumer health and safety.
Purpose of the Study:
- To analyze the concentration of 12 mineral elements in 10 commercially available table salts.
- To assess the variability of mineral content based on salt type and origin.
- To evaluate potential health implications of the detected mineral levels.
Main Methods:
- Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was employed for elemental analysis.
- Thermal Decomposition Amalgamation-Atomic Absorption Spectrophotometry (TDA-AAS) was also utilized.
- Ten distinct salt varieties sourced from Southern Italy were analyzed.
Main Results:
- Mineral element concentrations varied significantly by salt type and geographical origin.
- Cobalt (Co), Chromium (Cr), Copper (Cu), Mercury (Hg), Lead (Pb), and Selenium (Se) levels were within tolerable limits.
- Aluminum (Al), Calcium (Ca), Iron (Fe), Manganese (Mn), Nickel (Ni), and Zinc (Zn) showed significant variation among samples.
- Persian Blue and Atlantic Grey salts had high Iron (Fe) and Zinc (Zn) levels.
- Persian Blue and Smoked salts exhibited high Nickel (Ni) levels.
- Lead (Pb) exceeded maximum permissible levels in all analyzed salt samples.
Conclusions:
- Table salt mineral composition is highly variable, influenced by origin and type.
- While some elements like Fe and Zn may offer benefits in specific salts, others like Ni and Pb pose risks.
- Elevated Lead (Pb) levels across all samples highlight a significant public health concern.
- Continuous monitoring of mineral content in table salts is recommended to ensure consumer safety.
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