To comprehensively clarify the distribution of the trace elements in agricultural products and ensure the quality and safety control of agricultural products, a multimode sample introduction system (MSIS) and inductively coupled plasma optical emission spectrometry (ICP-OES) were used. A new strategy for simultaneous determination of hydride-generation elements (As, Se, Sn, Sb, Hg) and non-hydride-generation elements (Cr, Mn, Fe, Ni, Cu, Zn, Mo, Sr, Cd, Pb) in brown rice was proposed. The brown rice samples were digested by a microwave digestion system. The MSIS was operated in dual mode and the multi-elements in the sample solution were determined by ICP-OES. The efficiency of hydride-generation elements was improved by adding a mixed solution of 20 g/L L-cysteine/40 g/L tartaric acid online as a pre-reducing agent, and the fast automatic curve fitting technology (FACT) model was constructed based on the deconvolution of the spectral response data to correct for spectral overlap and background interference. Y and Bi were selected as the internal standard element to correct the matrix effect, and the national standard reference material Hunan rice (GBW10045) was used to evaluate the accuracy and reliability of the analytical method. Results showed that the limit of detection (LOD) was 0.01-1.06 μg/L, the spiked recovery was 93.0%-106%, and the relative standard deviation was 2.2%-4.9%. The developed method is suitable for high-throughput analysis of multi-elements in brown rice.
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