采用稀硝酸和过氧化氢溶液对生物柴油进行微波消解,并利用电感耦合等离子体质谱仪(ICP-MS)对消解后的生物柴油进行微量元素测定,研究硝酸浓度和过氧化氢添加量对生物柴油消解效果的影响,并综合剩余碳含量和剩余酸度作为评价指标.结果表明:当采用6.0mL浓度为6.0mol/L的硝酸和2.5mLH2O2的混合溶液对0.6g生物柴油进行微波消解后,剩余碳含量和剩余酸度分别为5.3％和6.4％;ICP-MS测定Ba,Mn,Mo,Cr,Cu,Ni,Pb,Sr,V,Zn等分析物的加标回收率为94.2％～107.4％,相对标准偏差小于4.33％.%A microwave-assisted digestion using diluted nitric acid and hydrogen peroxide as auxilia-ry agent was explored to determine trace elements in biodiesel by inductively coupled plasma mass spec-trometry(ICP-MS). The effect of nitric acid concentration and volume of hydrogen peroxide on biodiesel digestion was investigated,using residual carbon content and residual acidity in final solutions as evalua-tion index. Results showed that 0. 6 g of biodiesel was almost completely digested under the optimal con-ditions:6 mL nitric acid(6 mol·L-1 )and 2. 5 mL hydrogen peroxide. The residual carbon content and the residual acidity in digests were lower than 5. 3％ and 6. 4％,respectively. After sample digested,Ba, Cr,Cu,Mn,Mo,Ni,Pb,Sr,V and Zn were determined by ICP-MS and the recovery rate was in the range of 94. 2％ to 107. 4％. All RSDs were less than 4. 33％.
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