微波消解、石墨炉原子吸收光谱法测定土壤中的铅  

Determination of Lead in the Soil by Graphite Furnace Atomic Absorption Spectrometry with Microwave Digestion

作　　者：张卫锋[1] 洪振涛[1] 邓香连[1] 刘颖琪[1] 

机构地区：[1]广州市农业标准与监测中心

出　　处：《光谱实验室》2005年第6期1204-1206,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：采用微波消解系统处理土壤样品,可以大大减少消化试剂的用量及样品的处理时间。石墨炉原子吸收光谱法测定土壤中的铅,以磷酸二氢铵和硝酸镁作混合基体改进剂,可提高灰化温度,消除基体干扰。方法简便,快速,准确度高。铅的测定结果相对标准偏差为0.44%—5.2%;检出限为0.25mg/kg。Soil sample was digested with microwave system to greatly reduce the amount of digestant and digesting time. Pb in soil was determined by graphite furnace atomic absorption spectrometry with NH4H2PO4 and Mg（NOs）z as matrix modifier to enhance the ashing temperature and eliminate the matrix interference. The method is rapid, simple and accurate with relative standard deviation of 0. 44%-5.2% and detection limit of 0. 25mg/kg.

关 键 词：微波消解 石墨炉原子吸收光谱法 基体改进剂 土壤 铅 

分 类 号：O657.31[理学—分析化学]