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为了使硅钼蓝光度法能适用于高岭石粘土中硅含量的测定,本文对此法进行了系统的研究:为使高聚合态的硅酸转化为能与钼酸铵反应的单硅酸,可加入5～10ml 2％氟化钾溶液;在发包液中加入5～12 ml乙醇,能使硅钼黄的吸光度保持二小时稳定不变;同时对硅钼黄、硅钼蓝形成条件作了一些改进,拟定的方法具有准确度高、稳定性好和适用范围广等特点。制订了下述分析步聚:称取0.2000克试样于盛有1克混合熔剂(无水碳酸钠:硼砂=1:1)
In order to make silicon molybdenum blue spectrophotometry can be applied to the determination of silicon content in kaolinite clay, this paper systematically studied this method: In order to convert highly polymerized silicic acid to ammonium monosilicate , 5 ~ 10ml 2% potassium fluoride solution can be added; adding 5 ~ 12 ml ethanol in the contracting liquid can keep the absorbance of silicon molybdenum yellow stable for two hours; at the same time, the conditions of silicon molybdenum yellow and silicon molybdenum blue are formed Some improvements, the proposed method with high accuracy, good stability and a wide range of applications and so on. The following analytical steps were formulated: Weigh 0.2000 grams of the sample in 1 gram of mixed flux (anhydrous sodium carbonate: borax = 1: 1)