【摘要】 采用氟硅酸钾容量法对硅肥中测定有效硅含量的实验条件进行了研究。氟硅酸钾容量法能够准确、快速、简便测定硅肥中有效硅含量。推荐沉淀冷却时间应控制在30min以上;沉淀的洗涤温度应控制在15℃以下;滴定指示剂可选用酚酞;通过对氟硅酸钾分析纯的水解,验证此方法水解完全。更多还原

【Abstract】 The test conditions of determination method for available SiO₂ content in silicon-containing fertilizer with potassium fluorosilicate volumetric analysis were studied.The available SiO₂ content in silicon-containing fertilizer can be exactly determined with potassium fluorosilicate volumetric analysis. The recommendatory refrigerant time must be above 30 min ;the washing for deposit temperature must be controled under 15 degree;the indicator of titration shold be phenothalin.By the hydrolyzation of potassium fluorosilicate ,the hydrolyzation can be validated absolutely.更多还原