摘要
报道了水玻璃模数测定方法的改进,有以下要点:①加入氟化钠过饱和溶液,以保证与二氧化硅充分完全反应;②基本固定取样量,以免取样过多或过少所造成误差;③随试样的分析全过程,作空白试验,以补偿由氟化钠所引起的碱度;④用精密pH试纸或pH计检测滴定终点。以上改进提高了方法的分析速度和精密度。
Modifications of the conventional method for the determination of modulus of water glass were described in this paper. The main points are as follows： （1） A supersaturated solution of sodium fluoride was used to ensure its complete reaction with SiO2; （2） Definite amount of sample was taken to avoid error arisen from variations of sample mass; （3） A blank test was taken through the whole process of determination to compensate the alkalinity of sodium fluoride; and （4） End-point of titration was recognized by checking with precise pH-paper or determined by pH-meter. More rapid and precise determinations were achieved by these modifications.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2008年第1期47-49,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
水玻璃模数
快速及精密测定
测定方法的改进
Modulus of water glass
Rapid and precise determination
Modified method of determination
