亚甲蓝比色法测定水中阴离子表面活性剂的方法探讨

Study on Using Methylene-blue Colorimetric Method to Determine Anionic Surfactants in Water

采用亚甲蓝比色法测定水中阴离子洗涤剂是目前较为简便、迅速、准确可靠又经济的测定方法。样品经中速定性滤纸过滤除去悬浮物后,加入酚酞试剂经酸碱中和后直接加入亚甲蓝显色液,用三氯甲烷分次萃取,该实验相对偏差,工作曲线、相关系数均达到了方法所规定的要求。

Methylene-blue colorimetry of determining anionic detergents in water is, at present, an easy, quick, reliable, accurate and economic way. Through take some samples,filt the samples with medium-speed qualitative filter paper to remove the suspended matters, then put in phenolphthalein which mixes with acid and soda, then add directly methylene blue,the chromogenic agent to it, and extract it with trichloromethane several times. The experiment meets the requirement of the method in relative derivation, working curve and correlation cocficient.