结晶硅杂质中铁、铝含量的多少是影响产品、等级的重要因素。按部标准测定铁、铝均采用EDTA容量法,这对于每一批出厂产品的质量检验来说是应该执行的,但对于工厂生产控制,每天都有大量试样须要检验,就显得比较费时;为此我们用比色法进行试验,结果是令人满意的,可节省许多人力和时间。试验情况及方法如下。一、铁的测定——1.10菲罗啉分光光度法 Crystalline silicon impurities in iron, aluminum content is how much is the impact of products, an important factor in the grade. According to the standard determination of iron and aluminum are used EDTA capacity method, which for each batch of manufactured products quality inspection should be implemented, but for the factory production control, a large number of samples need to be tested every day, it is more time-consuming; For this reason we used colorimetric test, the result is satisfactory, can save a lot of manpower and time. Test conditions and methods are as follows. First, the determination of iron --1.10 phenanthroline spectrophotometry