调整标准化样品相对强度提高光电直读光谱法测定生铁中硫的准确度

Raising of Accuracy in Photo-Electric Direct Reading Spectrometric Determination of Sulfur in Pig Iron by Adjustment of Relative Spectral Intensity of the Re-Calibration Standard Samples

用光电直读光谱法测定生铁中硫量,得到与标准化样品的标准值相比系统偏低的结果。为解决此问题,试验了将高、低含硫量的两个标准化样品所产生硫的相对谱线强度作出调整,从而消除了上述的系统误差。测得含硫量的相对误差,对含硫量在0.02%(质量分数)左右的生铁试样,可保持在±0.002%之内。

In the photo-electric direct reading spectrometric determination of sulfur in pig iron, systematically low results were obtained as compared with the standard values of the re-calibration standard samples. It was found that by adjustment of the relative spectral intensity produced by sulfur in two recalibration standard samples with high and low sulfur contents, the systematic errors occurred were satisfactorily eliminated. In analyzing samples having sulfur contents around （ws） 0.020%, relative errors obtained were within ±0.002%.