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鉴于聚磷酸铵(App)的难溶性及聚磷酸在常温下的易降解性,本文提出用H型树脂在低温(≤10℃)下静态交换、甲基橙-甲酚红双指示剂连续滴定测定长链App聚合度的快速方法。数据处理效率比经典的pH滴定曲线法提高～5倍。
In view of the poor solubility of ammonium polyphosphate (App) and the easy degradation of polyphosphoric acid at room temperature, this paper presents a static exchange of H-type resin at low temperature (≤10 ℃), continuous titration of methyl orange-cresol red dual indicator A quick way to determine the degree of polymerization of a long-chain App. Data processing efficiency is ~ 5x better than the classical pH titration curve method.