【摘要】 [目的]为探索不同酸体系微波消解土壤对重金属的测定影响,以获得最佳微波消解土壤的方法。[方法]采用不同混合酸进行微波消解,并运用原子吸收光谱(AAS)法测定了样品中Pb、Cr和Cd 3种重金属元素。[结果]采用硝酸(HNO3)-氢氟酸(HF)-高氯酸(HClO4)三酸消化体系微波消解土壤样品,测定的结果均在标准值范围以内,精密度高。[结论]微波消解-AAS法应用于土壤样品的重金属元素分析,具有消解完全、污染少、效率高和准确度高等优点,多次测定获得满意的结果。更多还原

【Abstract】 [Objective]The paper aimed to explore different mixed acid by microwave digestion for the determination of heavy metal in soil,in order to obtain the best method by microwave processing soil. [Method]The soil samples were used different mixed acid by microwave digestion, and determined three kinds of heavy metal elements the sample of Pb,Cr and Cd in soil by microwave digestion-atomic absorption spectrum( AAS) method. [Result]The results showed that the soil samples were used three acid nitric acid-hydrofluoric acid-perchlorate by microwave digestion system,there were high precision and within the standard range. [Conclusion]This method had completely dissolution,less pollution, high efficient and accuracy,and there were obtained a satisfactory result by multiple determinations.更多还原