直接进样-冷原子吸收光谱法测定润滑油中汞  

CV-AAS Determination of Mercury in Lubrication Oil with Direct Sample Introduction

作　　者：余淑媛[1] 陈向阳[1] 李彬[1] 邹春海[1] 刘志红[1] 王宏菊[1] 

机构地区：[1]深圳出入境检验检疫局,深圳518045

出　　处：《理化检验（化学分册）》2010年第9期1070-1072,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：科技部十一五国家科技支撑计划课题(2006BAK10B03)

摘　　要：将直接进样技术应用于冷原子吸收光谱法测定润滑油中汞含量,以防止常规酸消解样品时造成的汞损失。适宜的取样量为0.1 g,选择分解温度为850℃,分解时间为120 s,并在仪器操作时预先设置。汞的质量分别为35 ng以内及35-600 ng之间与其吸光度（峰高）呈线性关系,方法的检出限（3S/N）为0.07 ng。用标准加入法作回收试验,得出回收率在95.0%-102.3%之间,相对标准偏差（n=7）在2.1%-5.3%之间。Direct sample introduction technique was applied to the CV-AAS determination of mercury in lubrication oil to prevent the loss of mercury during the conventional pretreatment of sample by acid digestion.0.1 g of the oil sample was taken for a determination,and the working conditions of the instrument were optimized and preset as follows： ① decomposition temperature： 850 ℃ and ② decomposition time： 120 s.Linear relationships between values of absorbance（peak height） and mass of mercury were obtained in the ranges of within 35 ng and 35-600 ng.Detection limit（3S/N） found was 0.07 ng.Recovery of the method was tested by the standard addition method,and the results obtained were in the range of 95.0% to 102.3%,with values of RSD′s（n=7） ranged from 2.1% to 5.3%.

关 键 词：冷原子吸收光谱法 直接进样 润滑油 汞 

分 类 号：O657.31[理学—分析化学]