环境监测仪器设备是环境监测获得相应数据的重要手段。紫外分光光度法目前已

环境监测仪器设备是环境监测获得相应数据的重要手段。紫外分光光度法目前已经被广泛的应用在环境监测领域，为我国的可持续发展战略提供了一定的帮助。在长期的使用和研究过程中，其各个方面的性能也得到了不断的完善创新，因此在未来的发展中将不断的得到推广。本论文分别使用碱性过硫酸钾消解紫外分光光度法测定城市河道截污前后的总氮，结果显示截污前总氮超标率达100%，截污后总氮合格率达57%，河道截污工程治理的效果明显。使用纳氏试剂分光光度法测定污水处理厂出水中的氨氮为2.56mg/L，使用钼酸铵分光光度法测定污水处理厂出水中的总磷为0.15mg/L，均符合符合《城镇污水处理厂污染物排放标准》GB 18918-2002一级A标准。使用二苯碳酰二肼分光光度法测定自来水中的六价铬为0.003mg/L；使用麝香草酚分光光度法测定自来水中的硝酸盐氮为1.49mg/L，均符合《生活饮用水卫生标准》（GB 5749-2006）表1中的限值浓度。

环境监测仪器设备是环境监测获得相应数据的重要手段。 紫外分光光度法目前已经被广泛的应用在环境监测领域，为我国的可持续发展战略提供了一定的帮助。 在长期的使用和研究过程中，其各个方面的性能也得到了不断的完善创新，因此在未来的发展中将不断的得到推广。 本论文分别使用碱性过硫酸钾消解紫外分光光度法测定城市河道截污前后的总氮，结果显示截污前总氮超标率达100%，截污后总氮合格率达57%，河道截污工程治理的效果明显。 使用纳氏试剂分光光度法测定污水处理厂出水中的氨氮为2.56mg/L，使用钼酸铵分光光度法测定污水处理厂出水中的总磷为0.15mg/L，均符合符合《城镇污水处理厂污染物排放标准》GB 18918-2002一级A标准。 使用二苯碳酰二肼分光光度法测定自来水中的六价铬为0.003mg/L；使用麝香草酚分光光度法测定自来水中的硝酸盐氮为1.49mg/L，均符合《生活饮用水卫生标准》（GB 5749-2006）表1中的限值浓度。

Environmental monitoring instruments and equipment are important means to obtain corresponding data for environmental monitoring. UV spectrophotometry has been widely used in the field of environmental monitoring, which provides some help for the sustainable development strategy of our country. In the long-term use and research process, its performance in various aspects has been constantly improved and innovated, so it will be promoted in the future development. In this paper, alkaline potassium persulfate was used to digest the total nitrogen before and after sewage interception by ultraviolet spectrophotometry. The results showed that the rate of total nitrogen exceeding the standard before sewage interception was 100%, the rate of total nitrogen passing the standard after sewage interception was 57%, and the effect of sewage interception engineering treatment was obvious. The ammonia nitrogen in the effluent of the sewage treatment plant is 2.56mg/l by Nessler reagent spectrophotometry, and the total phosphorus in the effluent of the sewage treatment plant is 0.15mg/l by ammonium molybdate spectrophotometry, all of which conform to the first class a standard of the discharge standard of pollutants for urban sewage treatment plant (GB 18918-2002). The determination of hexavalent chromium in tap water by diphenylcarbazide spectrophotometry is 0.003mg/l; the determination of nitrate nitrogen in tap water by thymol spectrophotometry is 1.49mg/l, all in line with the limit concentration in Table 1 of the hygienic standard for drinking water (GB 5749-2006).<br>