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ResearchBlogging.org

Here is a quick post of a study about inorganic elemental contents in white rice of seven Asian countries. The  authors determine the contents with neutron activation analysis (NAA).

For all “rice-vores” out there, this study is for you.

Here are the results:

Courtesy: Moon, J.,et al, Journal of Radioanalytical and Nuclear Chemistry, 2012

The elements – Arsenic (As), Potassium (K), Manganese (Mn) , Sodium (Na), and Zinc (Zn), are specially noted since these can be harmful or can be essential to the human body.

When the authors calculated the daily intake of these elements based on the assumption of 300 grams of daily rice consumption, they obtained the following:

Upper table: Calculated daily intake. Lower graph: % of DL/RDA. Courtesy: Moon, J.,et al, Journal of Radioanalytical and Nuclear Chemistry, 2012

Upper table: Calculated daily intake. Lower graph: % of DL/RDA. Courtesy: Moon, J.,et al, Journal of Radioanalytical and Nuclear Chemistry, 2012

The graph on the right hand side (below the table), is an evaluation of the daily dietary intake with respect to a 70 kg person. If you happen to be eating 300 grams per day of rice from China, you will surpass the allowable safe exposure limit for As. Arsenic is a toxic element.

Even though the calculated daily intake of Mn are higher than the recommended dietary allowance in all countries, these levels are still way below the tolerable upper limit.

Maybe you want to know how they got the sample. Here’s how:

Courtesy: Moon, J.,et al, Journal of Radioanalytical and Nuclear Chemistry, 2012

Courtesy: Moon, J.,et al, Journal of Radioanalytical and Nuclear Chemistry, 2012

Gallery (Click an image below to go to gallery view.)

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Journal reference:

Moon, J., Ebihara, M., Ni, B., Arporn, B., Setyo, P., Theresia, R., Wee, B., Salim, N., & Pabroa, P. (2011). A NAA collaborative study in white rice performed in seven Asian countries Journal of Radioanalytical and Nuclear Chemistry, 291 (1), 217-221 DOI: 10.1007/s10967-011-1245-1

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