European Chemistry Congress

Biography

Biography: Samanthika.R.Hettiarachchi

Abstract

Arsenic speciation studies on rice (Oriza sativa L.) have been carried out for the first time in Sri Lanka. For this study, the brown rice variety, AT 307 was cultivated in Wahalkada, Sri Lanka where large number of patients with Chronic Kidney Disease (CKD) was reported. Different arsenic species present in soil and different parts of paddy plants were determined using ICP-MS coupled with HPLC in order to understand the translocation of different arsenic species in different parts of paddy plants including rice grain. Concentration values of As(V) and As(III) in soil were found to be 0.05µg/g and in the not detectable range, respectively. There were no detectable organic arsenic species, Dimethylarsinous acid (DMAA) or monomethylarsinous acid (MMAA), in soil or any studdied paddy parts. The amount of As(V) and As(III) in roots were 0.67 µg/g and 0.60 µg/g respectively. Though paddy roots consisted of considerable amount of inorganic arsenic species, As (V) and As(III), the amount of As(V) and As(III) in matured rice grains were 0.02 µg/g and 0.10µg/g, respectively. There was a neglegible accumilation of inorganic arsenic species after milky stage. Total inorganic arsenic concentration value (0.12 µg/g) in studied rice grains is much less than the values (0.3 or 0.2 µg/g ) to be proposed by WHO as the standard for inorganic arsenic in brown rice.