摘要
采用络合滴定法、Fe(OH)_3沉淀法和碘量法等3种方法测定螯合剂EDTA的铁螯合值,并对测试结果和操作过程进行比较。结果表明,络合滴定法相对标准偏差最小,精度最高,操作简单、方便,且不受放置时间、溶液本身颜色的影响。故测定螯合剂铁螯合值时选用此法为宜。
Three methods,including complexometric titration method,ferric hydroxide sedimentation method and iodometric method,were used to determine iron chelating capacity of chelating agent EDTA.The results and operational process were compared.It was revealed that the complexometric titration method had the minimal relative standard deviation and the highest accuracy.It was easy to carry out,and was not influenced by the standing time and sample color.Thus,it was the most appropriate method to determine iron chelating capacity of chelating agents.
出处
《造纸化学品》
CAS
2010年第3期16-18,共3页
Paper Chemicals
关键词
络合滴定法
Fe(OH)3沉淀法
碘量法
铁螯合值
complexometric titration method
ferric hydroxide sedimentation method
iodometric method
iron chelating capacity
