Rice is known to accumulate methylmercury (MeHg) in the rice grains. MeHg as a neurotoxin impacts on the human central nervous systems and especially on the developing brain. In this exploratory study, 87 commercial rice products sold in Europe, including nine baby-rice products, were analyzed for total Hg and MeHg content. MeHg concentration in all rice products investigated range from 0.11 to 6.45 μg kg-1 with an average value of 1.91 ± 1.07 μg kg-1 and baby-rice is not significantly different from other rice products. Total Hg ranges from 0.53 to 11.1 μg kg-1 with an average of 3.04 ± 2.07 μg kg-1. MeHg concentrations in all rice products studied in this work would not exceed the provisional tolerable weekly intake (PTWI). 30 % of all commercial market rice products exceeded 10% of the PTWI calculated for toddlers or 13 % of products for adults with rice based diet.
Bibliographical noteP.M. thanks the Royal Thai Government for funding and C.C.B. thanks the School of Natural and Computing Science and PS Analytical for funding.
- market survey
- food quality