Urea concentration detection method and urea concentration online monitoring facility

The invention relates to a urea concentration detection method and a urea concentration online monitoring facility. Diacetylmonoxime can be subjected to the reaction in the presence of an acid reagentto generate butanedione; then butanedione reacts with urea to generate a red substance; and the urea concentration can be calculated by measuring the absorbance of the red substance under maximum absorption wavelength. The provided urea concentration detection method has the advantages that the color is stable, the interference of hydroxylamine is avoided, and the linear dynamic range is enlarged. The provided urea concentration online monitoring facility can measure the urea concentration of a swimming pool on site, and through the facility, a worker can know the change of urea concentrationof the swimming pool in real time. 本发明涉及种尿素浓度检测方法及种尿素浓度在线监测设备，由于二乙酰肟可在酸试剂下反应生成的丁二酮，丁二酮再与尿素发生反应生成红色物质，通过测量产物在最大吸收波长下的吸光度，可计算得到尿素的浓度。本发明提供的尿素浓度检测方法，产物颜色稳定，且可以避免羟胺干扰，扩大线性的动态范围；本发明提供的尿素浓度在线监测设备，可实现泳池内尿素浓度的现场测量，方便工作人员实时得知游泳池中的尿素浓度