一种水质全光谱水质监测仪器的研究  

Research on a Full Spectrum Water Quality Monitoring Instrument

作　　者：谢广群 周浩 XIE Guang-qun;ZHOU Hao(Guangdong Infore Technology Co.,Ltd.,Foshan 528322,China)

机构地区：[1]广东盈峰科技有限公司,广东佛山528322

出　　处：《化工管理》2021年第16期31-35,共5页Chemical Engineering Management

摘　　要：文章研究开发了一款免试剂、高度集成、响应快速、量程范围可变的全光谱水质在线监测仪,重点研究了该监测仪开发设计过程中影响仪器性能和应用的主要因素。同时重点就CODMn、硝酸盐氮两个污染因子建立全光谱反演模型,采用偏最小二乘法,得到硝氮的校正集预测标准偏差为0.1184,验证集预测标准偏差为0.2332;CODMn的校正集预测标准偏差为0.1366,验证集预测标准偏差为0.2265。对实际水样进行了测试,通过与实验室结果比对,硝氮的相对偏差不超过±5%,CODMn的相对偏差不超过±10%。A range-adjustable on-line water quality analyzer,possessing advantages of rapidity,high integration and reagent-free,was developed for synchronous determination of multiple parameters based on full spectrum analysis.The principle,overall design,and key factors in instrument performance for the analyzer were introduced.In the monitoring system,partial least-square method was used to obtain the transmission equations between absorbance and water quality parameters,such as nitrate(NO_(3)^(-)-N)and permanganate index(CODMn),by measuring the adsorption spectra of water sample with known NO_(3)^(-)-N or CODMn value.The standard deviation of calibration sets for NO_(3)^(-)-N and CODMn were 0.1184 and 0.1366,respectively;while the standard deviations of prediction set for them were 0.2332 and 0.2265,respectively.Then the instrumental reliability was well validated by comparing the measurement values of the analyzer with the laboratory results,as the relative error of the actual samples for NO_(3)^(-)-N and CODMn were controlled within±5%and±10%,respectively.

关 键 词：全光谱水质分析 硝氮 CODMN 偏最小二乘法 

分 类 号：X853[环境科学与工程—环境工程]