微波消解-GFAAS法测定土壤中的总铅

摘要

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.