Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam

This study, tAs is the only element that needs to be further investigated from the relatively high concentration in agricultural soil samples. There were seven out of eight rice samples which had the As level exceeded the Codex standard for polished rice, the inorganic Arsenic (iAs) is also needed to be analyzed for further conclusion.