微波消解—火焰原子吸收法测定垃圾焚烧飞灰中的金属含量

Determination of the Content Metal in Waste Incineration Fly Ash by Microwave Digestion and FAAS

采用NHO3＋HF＋H2O2体系微波消解垃圾焚烧飞灰，火焰原子吸收光谱法测定金属Cu，Fe，Pb，Ni，Mn，Cr和Cd的含量。结果表明，飞灰中Cu质量分数为0．8927mg／g，Pb质量分数为1．8490mg／g，Ni质量分数为0．1523mg／g，Mn质量分数为1．1033mg/g，Fe质量分数为86．4517mg／g，Cr质量分数为0．3667mg／g，Cd质量分数为0．0581mg／g。铁的检测限为3．9041mg／L，其它元素均小于1mg／L，加标回收率在98．0％-108．0％之间。RSD〈4．0％。该法简便快速，具有较好的准确度和精密度，测定结果为处理垃圾焚烧所产生的飞灰提供了理论依据。

By microwave digesting of the samples. The content of Cu, Fe, Pb, Ni, Mn, Cr and Cd in waste incineration flyingash was determined by the flames atom absorption spectrophotometer （FAAS） and used , the rusult shows that the content of Cu, Pb, Mn, Ni, Fe, Cr, Cd is 0. 892 7 mg/g, 1. 849 0 mg/g, 0. 152 3 mg/g, 1. 103 3 mg/g, 86. 451 7 mg/g; 0. 366 7 mg/g, 0.058 1 mg/g, respectively. The detectability of Fe is 3.904 1 mg/L, and the others less than 1 mg/L. The＇percentage recovery is 98.0% - 108.0%, RSD 〈 4. 0%. The method is sensitive and accurate. It can provided academic basis for dispose waste incineration flyingash.