程序控温石墨消解-原子荧光光谱法测定土壤中的硒  

Determination of Total Selenium in Soil by Atomic Fluorescence Spectrometry with Program Temperature-Controlled Graphite Digestion

作　　者：张维宇[1] 张土秀[1] 倪天增[1] 

机构地区：[1]中国广州分析测试中心,广州510070

出　　处：《中国无机分析化学》2011年第4期36-39,共4页Chinese Journal of Inorganic Analytical Chemistry

摘　　要：研究了程序控温石墨消解系统消解样品,原子荧光光谱法测定土壤中硒的方法,建立了测定土壤中硒时石墨消解过程中的消解液、消解温度、消解时间和消解程序,确定了氢化物发生-原子荧光光谱仪的仪器工作条件及最佳氢化反应条件,获得了满意的分析结果。方法在1～10μg/L范围内呈线性关系,检出限为0.15μg/L,相对标准偏差为3.2%,加标回收率在92%～108%之间。石墨消解-原子荧光光谱法测定土壤中的硒具有操作简便、消解时间短、消解液用量少、消解过程自动化、精密度高、准确性好等优点,大大减轻了检测人员的劳动强度、减少了对检测人员身体的伤害,并适合快速测定大批量土壤样品中的硒。A program temperature-controlled graphite digestion method was developed and used in the determination of total selenium in soil using atomic fluorescence spectrometry（AFS）. Digestion fluid, digestion temperature, digestion time and digestion procedure were determined. Working conditions of hydride generation-atomic fluorescence spectrometer （HG-AFS） and optimal hydrogenation reaction conditions were found under which satisfactory analytical results were obtained. The linear range was 1-10 μg/L, the detection limit of selenium was 0.15 μg/L, the relative standard deviation was 3.2% , and the recoveries were 92% -108%. The advantages of this method include simple operation, short digestion time, small amount of digestion fluid, automatic digestion process, high precision, high accuracy, greatly reduced labor intensity and physical harm for users. It is particularly suitable for the rapid determination of large quantities of soil samples.

关 键 词：石墨消解 原子荧光法 硒 土壤 

分 类 号：O657.31[理学—分析化学] TH744.11[理学—化学]