水玻璃组成快速测定方法改进  

A Modified Method of Rapid Determination for Composition of Water Glass

作　　者：徐冬梅[1] 仝宇[1] 田维亮[1] 朱丽丽[1] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266510

出　　处：《广东化工》2010年第2期126-127,158,共3页Guangdong Chemical Industry

摘　　要：水玻璃的用途十分广泛,几乎遍及到国民经济的各个行业。不同模数的硅酸钠有着不同的用处,而模数作为水玻璃的重要参数,目前其测量的通常方法是分别测出Na2O和SiO2的质量分数然后算出其模数。文章介绍了以溴百里酚蓝指示剂部分取代甲基红指示剂,实现快速测定水玻璃模数的一种新方法,该方法省去了氢氧化钠标准溶液的返滴过程,更加简便、快捷,并详细阐述了该方法的基本原理和实验步骤,计算方法以及相关数据。Water glass has a very widc use that almost cover every field of the national economy. Sodium silicates with different modulus have different use, as an important parameter of sodium silicates, the modulus can be calculated by measuring the mass fractions of Na2O and SiO2 at present The paper has described a new method that use bromothymol blue indicator to partly replace the methyl red indicator to realize rapid determination of water glass modulus.In the methord, the back drop process that used sodium hydroxide standard solution was eliminated and thus easier and faster. The basic principles, experimental procedures, calculation methods and relevant data were also presented in detail.

关 键 词：水玻璃组成 模数 溴百里酚蓝指示剂 

分 类 号：O65[理学—分析化学]