水不溶物聚合硫酸铁含量测定方法的探讨

Improvement Method for Determination of Polymerized Ferric Sulfate in Water Purification Agent

目的改进国家标准GB14591-2006水不溶物含量测定方法。方法采用先测净水剂中含量较高的水可溶物含量,再用100%减去可溶物含量,既得到水不溶物含量。结果将本方法检测的数据与国家标准方法(GB14951-2006)检测数据比较,差异无统计学意义(P>0.05)。RSD为0.28%～2.85%。结论改进后的方法符合实验要求,步骤简便、操作性强,结果准确可靠。

Objective To improve the national standards method （ GB 14591-2006） to determine water insoluble substance content.Methods The content of water soluble substance was measured firstly in the water purification ,then the content of water insoluble substance was calculated by formula . Results Data from the national standards method （GB 14951-2006） and the improvement method didn’t show significant difference （P〉0.05）,RSD was 0.28%-2.85%. Conclusion The improved method matches the method precision requirement. It is easy to operate,accurate and dependable.