Abstract：A method for determining trace Se in coal by microwave digestion and hydride generation ICP-AES is reported. The digestion system of HNO3-HCl-HF was evaluated. The hydride generation occurred in 3 mol·L-1 hydrochloric acid media with 1% sodium tetrahydroborate as a reduction reagent. The experimental conditions of microwave digestion, prereduction，and interferences were investigated. This method is simple and rapid. The treatment method was applicable to Se and gave results that were in good agreement with the certified values of the standard reference material. Testing results showed that the detection limit was 0.3 μg·L-1 and RSD was below 5%.
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