Estimated exposure to As, Cd, Pb and Hg for the general population in rice from Zhejiang province and the percentage of the safe value.

aThe provisional tolerable weekly intake (PTWI) of 21 µg/kg bw (equivalent to 3 µg/kg bw/day) according to JECFA [35].bPTMI 0.025 mg/kg bw on a monthly basis according to JECFA [36].c For adults (1 µg/kg bw per week) and for children (4 µg/kg bw per week) according to JECFA [35].dBased on cardio-vascular effects according to EFSA [37].