溴化聚苯乙烯中溴、氯含量连续测定方法

A simultaneous determination m ethod of bromide and chloride content of brominated polystyrene

提出了一种连续测定溴化聚苯乙烯中溴、氯含量的新方法。用四氢呋喃作溶剂溶解样品．加入联苯钠脱有机卤素，然后加水稀释，用稀硝酸调节pH值，采用ZD-2电位滴定仪测定等当点．从而确定溴、氯含量。检测范围溴含量在40％-70％，氯含量在0．5％～5％。该方法简单、快速、准确。

A new method of simultaneously determining bromide and chloride content of brominated polystyrene is introduced. Organic halogen is transformed into inorganic halogen by sodium biphenyl in the presence of tetrahydrofuran. Then an acidic aqueous solution including Br- ,Cl- ion is analyzed by ZD-2 potentiometric titrator to determine bromide and chloride content. The applicable scope is 40% -70% to bromide,0.5% -5% to chloride. Such a method is accurate, rapid and practical.