微波消解-GFAAS法测定土壤中的总铅

Determination of Total Lead Contents in Soil by Microwave Digestion-GFAAS

研究了微波消解-GFAAS法测定土壤样品中总铅的方法。土壤样品加入HNO3+HF,经微波消解体系消解后,在恒温加热器上赶酸并除硅,石墨炉原子吸收光谱法(GFAAS)测定土壤样品中的总铅。测定数据经过与国标(GB/T 17141-1997)消解方法的比对,以及对不同土壤及土壤标准物质的测试。结果表明,两者无显著性差异,且此法重复性好,试剂用量少,安全易控制,结果可靠。

It studied a method of microwave digestion-GFAAS for the determination of total lead in soil. HNO3 and HF were added into the soil samples,the microwave digestion under the certain condition was conducted and in a constant temperature heater to drive acid and remove silicon, then total lead content in soil was determined by Graphite Furnace Atomic Absorption Spectrometric（GFAAS） method. Compared with the national standard （GB/T 17141-1997） digestion method ,and determined the different soil and soil standard substances, the results show that： the two methods have no significant difference. This method is well repeatable, with less reagent dosage, safe and easy to control and it is reliable.