摘要
在酸性介质中，余氯使甲基橙褪色，最大吸收波长510nm，摩尔吸光系数A510=5．41×10^-3 l／mol·cm，余氯质量浓度在（0．05～1．00）mg／1范围内遵守朗伯——比耳定律。对甲基橙溶液的加入量、样品溶液褪色后其吸光值的稳定性等方面作了条件试验，同时与邻联甲苯胺（OT）比色法和N，N-二乙基对苯二胺（DPD）分光光度法进行比对测定，结果表明三种方法测定结果基本一致。
In the acid medium, residual chlorine discolors the methyl orange whose biggest wave length of absorption is 510 nm. The Moore coefficient A510 = 5.41×10^-3 l/mol cm, and the residual chlorine, if in the scope of 0.05 to 1.00 mg/1, its mass concentration follows Lambert - Beer Law. Conditioned experiment is conducted on the input quantity of methyl organge, the absorptance stability of the sample solution after discoloration, together with the comparative study of o - Tolidine colorimetric method and DPD UV - spectrophotometry. It turns out the results of these three methods are to a large degree consistent.
出处
《环境科学与管理》
CAS
2007年第8期127-129,共3页
Environmental Science and Management
关键词
余氯
甲基橙
分光光度法
生活饮用水
residual chlorine
methyl orange
spectrophotometry
drinking water
