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Study on trace elements of popular rice varieties in Bangladesh

Research Paper | October 1, 2017

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Ruman Uddin, Gourpada Biswas, Dipak Kumar Paul, Most. Nurtaj Khatun, Md. Ferdus Alam, Roksana Huque, Md. Kamruzzaman Munshi

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Int. J. Biosci.11( 4), 237-246, October 2017

DOI: http://dx.doi.org/10.12692/ijb/11.4.237-246


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Rice (Oryza sativa) is as staple food in Asian countries and major source of nutrients for mass people especially in Bangladesh. Here different rice varieties are grown in three rice growing seasons per year viz. Aus, Aman and Boro. Rice, being a staple in the diet of Bangladeshi people and a source of heavy metal, intake of heavy metal is increasing day by day which is very injurious to health. So it is very important to estimate the elemental analysis of heavy metal present in rice. In this study the Atomic Absorption Spectrophotometry (AAS) method was used where four rice varieties (Minicat, BRRI 28, BRRI 29, Swarna) from field and market were evaluated. The highest amount of calcium, phosphorus, iron and zinc were found 60.62mg/100g in Minicat from market, 276mg/100g in Minicat from field, 5.13mg/kg in Minicat from market, 16.20mg/kg in Minicat from market, respectively. All of the elements detected in the rice were very low in concentration or within normal limits for consumption. Copper (Cu), Manganese (Mn), Chromium (Cr), Lead (Pb) and Cadmium (Cd) content of these  rice varieties between field and market rice were found 2.93-5.67, 3.66-9.55, 0.16-0.57, 0.13-0.94, 0.19-0.93 mg/kg respectively. High level of Zinc (Zn) and Iron (Fe) were found in Minicat from market rice than field rice. Manganese content was high in field and market Swarna compared to all other rice varieties. Daily dietary intake of the individual elements supplied through rice were calculated and compared with the available literature values of daily allowances. It can be concluded that Manganese (Mn) and Cadmium (Cd) concentration in rice samples indicate possible health risk to the consumer.


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