光电直读光谱法分析钛合金时铝对碳干扰及校正

研究发现用光电直读光谱法分析钛合金时，碳工作曲线的精密度很差，其原因主要是共存的铝所引起，几种常用钛合金中铝含量高达w（Al）]6％，在试样激发时，较高含量的铝在193．003nm波长处谱线强度较高，而此谱线与碳的分析线193．090nm十分靠近，造成了强度叠加的光谱干扰和正误差。在制作碳的工作曲线找到了通常遇到两类干扰，即平移干扰和转动干扰，并计算得到这两类干扰校正系数，利用校正系数可对仪器直接测得的谱线强度和工作曲线各实验点的强度作出校正，按校正后的工作曲线查得的钛合金试样的碳含量与已知值很符合。

CORRECTION OF INTERFERENCE OF ALUMINUM TO THE DETERMINATION OF CARBON IN THE DIRECT-READING AES ANALYSIS OF TITANIUM ALLOYS

It was found that in the direct-reading AES analysis of titanium alloys,linearity of the working curve of carbon was poor in precision,due to the interference of co-existing aluminum as an alloying element.The content of aluminum in some kinds of commonly used titanium alloys amounts to about 6%,which during excitation of the sample gave relatively strong spectral intensity at the wave-length of 193.003 nm,very close to the analytical spectral line of crabon at 193.090 nm,thus leading to an additive spectral interference and a positive error.Two types of interferences were encountered in the preparation of the working curve of carbon,i.e.the translational interference and of revolving interference and the correction factors for both these interfering effect were determined,by which the spectral intensity measured for carbon was corrected.By using the corrected working curve,analytical results of carbon obtained were in conformity with the known values.