原子吸收光谱法测定纯铼中痕量元素钠

Determination of Tracesodium in Pure Rhenium by AAS

采用火焰原子吸收光谱法（AAS）法测定纯铼中痕量元素钠。对仪器工作条件如光谱通带、灯电流、乙炔流量进行了分析，优化了原子吸收测量条件。Na的质量分数在0．0001％～0．001％范围内与吸光度彳线性关系良好，线性方程为A=176．1c＋0．004，相关系数，r=0．9997，方法检出限为0．0014μg／mL。钠测量结果的相对标准偏差不大于7．29％（n=8），回收率为93．3％-107．4％。该法操作简便、分析时间短、干扰少。

The determination of trace Na in pure rhenium was investigated by AAS, measuring conditions such as light spectrum pass band, lamp current, air-2H2 flow rate were analyzed, and the measuring conditions of AAS was optimized. The mass fraction of Na was linear with the absorbance in the range of 0.000 1%-0.001%, the regression equation was A=176.1c＋0.004, the correlative coefficient r=0.999 7. The detection limit was 0.001 4 μ g/mL. The relative standard deviations of determination results were less than 7.29%（n=8）, the recovery was 93.3%-107.4%. The method is simple, short analysis time, and less interference.