摘要
建立了抗坏血酸紫外褪色分光光度法测定水中余氯的新方法. 在pH 2～6介质中, 选择248 nm作为测定波长, 氯质量浓度在0～4.0 mg/L范围服从比尔定律. 回归方程为： ρ=10.109A＋0.0005 （mg/L）, 检出限0.02 mg/L, 水中常见的离子不干扰测定. 该法用于自来水、游泳池水等样品中余氯浓度的测定, 快速简便, 加标回收率在98%～104%之间.
A new method for the determination of residual chlorine in water supply by fading UV-speetrophotometry was established. In a medium of pH 2 - 6 with an absorption wavelength of 248 nm, Beer＇law is obeyed in the range of 0 - 4.0 mg/L for chlorine and the linear regression equation is： c = 10. 109A ＋ 0.0005（mg/L） ; The detection limit of chlorime is 0.02 mg/L. Some common coexisting ions such as Na^＋ , K^＋ , Ca^2＋ , Mg^2＋ , NH^4＋ , Cl^- , NO3^- , and SO4^2- gave no interference.The method has been applied to determination of residual chlorine in some water samples with satisfactory results
出处
《分析试验室》
CAS
CSCD
北大核心
2006年第5期110-112,共3页
Chinese Journal of Analysis Laboratory
关键词
余氯
抗坏血酸
紫外褪色光度法
水样
Residual chlorine
Ascorbic acid
UV-spectrophotometry
Water samples
