论文部分内容阅读
1.用磷钒钼黄比色法测定高磷(>0.4%)生铁时,磷含量相差多而吸光度为何增加不多?答:由于钒钼黄法测磷灵敏度低,“58-Ⅰ”型光电比色计只备有1厘米比色皿不适用。其他光电池式光电比色计,由于滤光片波长范围宽(除红色及橙色滤光片),不符合单色光的要求,因此工作曲线不能符合比耳定律,磷含量增高时,吸光度增加不多,曲线向浓度轴偏转。实际工作中不可将曲线绘成直线,更不可从
1. Phosphorus vanadium molybdenum yellow colorimetric determination of high-phosphorus (> 0.4%) pig iron, the phosphorus content difference between the more absorbance why the increase is not much? A: Vanadium molybdenum yellow phosphorus detection sensitivity, “58- ”Photoelectric colorimeter with only 1 cm cuvette is not applicable. Other photoelectric cell colorimeter, due to the wide filter wavelength range (except for red and orange filters), does not meet the requirements of monochromatic light, so the working curve can not meet the Beer’s law, phosphorus content increases, the increase in absorbance is not More, the curve deflects toward the concentration axis. The actual work can not be drawn in a straight line curve, but not from