杂散光对六价铬水质分析仪测量结果的影响及实验分析  

Effect and Experimental Analysis of the Stray Light on the Measurement Result of Hexavalent ChromiumWater Quality Analyzer

作　　者：袁颖华 孙颖奇 卢欣春 雷丽江 YUAN Ying-hua;SUN Ying-qi;LU Xin-chun;LEI Li-jiang(NARI Group Corporation/State Grid Electric Power Research Institute,Nanjing 211000,China)

机构地区：[1]南瑞集团(国网电力科学研究院)有限公司,江苏南京211000

出　　处：《光学与光电技术》2022年第1期21-24,共4页Optics & Optoelectronic Technology

基　　金：国家重点研发专项:地下水污染物快速甄别技术与风险快速检测设备(2019YFC1804802)资助项目。

摘　　要：目前微型分光光度计已广泛应用于水质在线分析仪器中,而杂散光作为分光光度计检定中的一个重要指标,其大小对于测量结果具有很大的影响。理论分析了杂散光的来源及其对分光光度计测量结果的影响,搭建了测试平台,对两台不同程度杂散光的微型分光光度计进行了检测,并将其分别应用于六价铬水质分析仪中,对不同浓度的标准溶液进行了测量,结果表明,杂散光的存在会引入较大的测量误差,且随着溶液浓度的增大,其影响更加严重。因此,在仪器设计制造和实际应用工作中须重视对杂散光的抑制和控制,从而提高仪器的测量精度,进一步保证用水安全,降低水质污染带来的各种风险。Micro spectrophotometers are widely used in water quality online analysis instruments,and thestray light is one of the key parameters to evaluat the performance of spectrophotometers.It can effect the datafrom the measurement results.The source of stray light and its effect on the measurement results of the spectrophotometer are analyzed in this paper.The stray light of two spectrophotometers is detected,and the two spectrophotometers are used in the hexavalent chromium water quality analyzer to measure different concentrations of standard solutions.The results show that the larger measurement errorsare introduced due to the stray light,and as the concentration of the solution increased,its impact would become more serious.The suppression and control of stray light should be emphasized in order to improving the measurement accuracy,ensuring the safety of agricultural water,and reducing the various risks caused by water pollution.

关 键 词：地下水 水质监测 杂散光 分光光度计 吸光度 

分 类 号：O433.1[机械工程—光学工程] TH744.1[理学—光学]