自来水系统中游离氯检测器的评价

Evaluation of Chlorine Sensors in Tap Water System

本试验采用2种氯测定仪(Cifec和Seres)连续在线检测水中的游离余氯(Cl2+HClO+ClO-)和游离有效余氯(HClO),所有检测数据均与采用DPD法在555 nm得到的不同质量浓度的次氯酸钠标准曲线进行检验.实验结果表明,氯测定仪可以连续便捷测定自来水中的游离余氯量,这对于水厂处理系统实现全自动化运行及其控制氯投加量有着深远的意义.

Two types of active chlorine sensors（Cifec and Seres）incorporated with pH sensor were applied to the measurement of active residual chlorine（HClO） and free residual chlorine （Cl2 ＋ HClO ＋ ClO- ）contained in tap water. All the obtained data were then evaluated with a standard curve of concentration of sodium hypochlorite（as Cl2 mg@L^-1）which was prepared by N, N-diethyl-p-phenylenediamine（DPD）method with spectrophotometer at 555 nm. Both Cifec and Seres can provide the active ＆ free residual chlorine accurately within their detection limits and detect chlorine concentration on-line in the tap water. It is useful for automatic determination of the residual chlorine at water treatment plant in the future.