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国家标准GB 1872-80对磷矿中氟含量测定分析方法有:硝酸钍容量法与氟离子选择电极法两种。笔者经过多年的工作经验认为,选用氟离子电极法操作简便、快速,仅50 min即可完成测定,准确度、精密度较好,符合中控的要求。1氟离子选择电极法实验1.1实验原理称取经研磨与烘干的试样0.1
National standards GB 1872-80 phosphate rock phosphate content determination of analytical methods are: nitric acid thorium capacity and fluoride ion selective electrode two. After years of work experience, I believe that the choice of fluoride ion electrode method is simple, fast, only 50 min to complete the determination, accuracy, precision is better, in line with the requirements of the control. 1 Fluoride ion selective electrode experiment 1.1 Experimental Principle Weigh the sample 0.1 after grinding and drying