石墨炉原子吸收光谱法测定土壤中铅的含量  

Pb Determination in Soil Samples by Graphite Furnace Atomic Absorption Spectrometry

作　　者：黄锋[1] 杨婷[1] 王禹鑫 

机构地区：[1]云南省昭通市疾病预防控制中心,云南昭通657000

出　　处：《云南化工》2012年第4期32-34,共3页Yunnan Chemical Technology

摘　　要：建立石墨炉原子吸收光谱法测定土壤中的微量铅的分析方法。用硝酸-盐酸-高氯酸体系进行土壤样品前处理,对试样分解、灰化及原子化温度进行选择,优化仪器工作参数及石墨炉升温程序。方法检出限为0.27μg/g,加标回收率为91.0%～96.1%,并利用国家标准物质验证了方法的准确度。Objeetive：A method was established to determine the micro -amount of lead in soil by graphite furnace atomic absorption spectrometry. Methods： The soil samples were pretreated with nitric acid- hydrofluoric acid-perchloric acid pre-treatment system, by adding diammonium phosphate matrix modifier to eliminate interference, by optimizing equipment operating parameters and graphite furnace temperature pro- gram to explore the different acid-soluble systems, matrix modifier and the impact of coexisting elements. Results： The detection limit for lead was 0.27 μg/g and the recovery was 91.0% -96.1%. The accuracy of the method was verificated by national standards. Conclusion： The method is rapid, high sensitive, less in- terference, easy operated, etc, and can be applied to the soil for trace lead determination with satisfactory results.

关 键 词：石墨炉原子吸收光谱法 土壤 铅 

分 类 号：O657.3[理学—分析化学]