Essential metal elements content in rice in Henan province of China

Department of Life Science and Technology, Xinxiang Medical University, Xinxiang Henan 453003,

P. R. China

E-mail : yqh3499@aliyun.com Fax : 86-373-3040015

Department of Experimental Center, Henan Institute of Science and Technology, Xinxiang Henan 453003,

P. R. China

School of Environment, School of Chemistry and Chemical Engineering, Henan Normal University 453007,

P. R. China

Manuscript received online 18 March 2013, revised 05 April 2013, accepted 14 April 2013

An analytical method using inductively coupled plasma optical emission spectrometry (ICP-OES) for rapid simultaneous determination of twelve essential metal elements (Fe, Mg, Mn, Se, Ni, Cu, K, Na, Ca, Zn, Co and Cr) in nine rice was performed. The pretreatment of the sample was also studied using a single microwave program by digesting extraction. The optimum operating conditions and wavelength emitted by twelve different elements were selected using the sensitivity and recovery of mixed standard solutions as criterions. The standard reference materials GBW10010 rice was used in order to verify the accuracy of the method and the results were in excellent agreement with the certified values. The uncertainties and concentration of constituent elements were determined and the possibility of their use in the quality control was considered.