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我厂炉前采用氟化钠-氯化亚锡比色法测定钢中含磷量,但此法显色后不很稳定。根据某些资料的介绍来看,多数是用加热1～3分钟来提高稳定性,也有加脲、硫脲、动物胶加热提高稳定性。为了适应炉前快速分析的要求,做了多种方法的试验。在加动物胶的基础上,经过反复试验作了改进,
I plant before the use of sodium fluoride - stannous chloride colorimetric determination of phosphorus in steel, but this method is not very stable after color. According to the introduction of some information, the majority is to use heating 1 to 3 minutes to improve stability, but also with urea, thiourea, animal glue heating to improve stability. In order to meet the requirements of rapid analysis before furnace, a variety of methods have been tested. On the basis of adding animal glue, after repeated tests made improvements,