一、引言微量硅的比色测定,有吡咯法、钼黄法、钼蓝法等。吡咯法虽灵敏度较高,但由于颜色不够稳定,故未被广泛采用。钼黄法不适用于二氧化铀中硅的分析,因大量铀的存在使溶液亦呈黄色,需要分离;且此法灵敏度较钼蓝法低五倍多。因此经试验后,我们采用 First, the introduction of micro-silicon colorimetric determination, pyrrole method, molybdenum yellow method, molybdenum blue method. Pyrrole method, although higher sensitivity, but not stable enough color, it is not widely used. The molybdenum yellow method is not suitable for the analysis of silicon dioxide in uranium dioxide. Due to the presence of a large amount of uranium, the solution is also yellow and needs to be separated; and the sensitivity of the method is more than five times lower than that of the molybdenum blue method. Therefore, after testing, we use