Stable Mercury Isotopes in Polished Rice (Oryza sativa L.) and Hair from Rice Consumers.

ABSTRACT: Mercury (Hg) isotopic signatures were characterized in polished rice samples from China, U.S., and Indonesia (n = 45). Hg isotopes were also analyzed in paired hair samples for participants from China (n = 21). For the latter, we also quantified the proportion of methylmercury intake through rice (range: 31-100%), and the weekly servings of fish meals (range: 0-5.6 servings/weekly). For these participants, 29% (n = 6) never ingested fish, 52% (n = 11) ingested fish < twice/weekly, and 19% (n = 4) ingested fish ≥ twice/weekly. In rice and hair, both mass-dependent fractionation (MDF, reported as δ²⁰²Hg) and mass-independent fractionation (MIF, reported as Δ¹⁹⁹Hg) of Hg isotopes were observed. Compared to rice, hair δ²⁰²Hg values were enriched on average (±1

SUBMITTER: Rothenberg SE 

PROVIDER: S-EPMC5464010 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature