摘要
单宁可将Fe3+还原为Fe2+,Fe2+与1,10-菲啰啉发生显色反应,生成的络合物在510nm波长下有最大吸收。基于此原理,并结合流动注射技术,建立了制革废水中单宁含量快速准确分析方法。方法线性浓度范围为0.10～5.00mg/L,检出限0.05mg/L,精密度(RSD)为0.492%。应用本方法测定制革废水中单宁含量,与行业标准方法结果一致。
An analytical method for determining tannins in tannery wastewater was developed.The procedure was based on the reduction of Fe3＋ to Fe2＋ by tannins and the complex of Fe2＋-1,10-phenanthroline was formed during the reaction.The maximum absorbance of the complex was 510nm.A linear calibration curve was obtained at the concentration range of 0.10~5.00mg/L.The detection limit is 0.05mg/L.The relative standard deviation is 0.492%.The test results agreed well with the currently used standard method for the determination of tannins in tannery wastewater.
出处
《中国皮革》
CAS
北大核心
2011年第1期29-32,共4页
China Leather
基金
国家863课题(2007AA09210101)
关键词
流动注射
分光光度法
制革废水
单宁
flow injection
spectrophotometry
tannery wastewater
tannins
