高氯离子水中化学需氧量检测系统的研究
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摘要
阐述了利用紫外分光光度法测量化学需氧量(COD)检测系统的研究方案,给出了利用光路设计与电子技术结合的研究方法。系统由光学系统、硬件电路、软件测量3部分组成。系统光路的设计使用了平面衍射光栅,狭缝等光学元件从而提高了光信号稳定性。电路系统选用高精度、低静态电流运放OPA2335,提高了微弱光信号的转换精度和响应速度。软件系统利用氯离子与COD的标定曲线排除氯离子对COD测量的干扰,最终能够实现在氯离子含量较高的水样中测量COD值。通过对COD标准溶液和加入氯离子的COD标准溶液的测量实验,及与HACH-DR6000分光光度计对实际水样检测的对比实验和稳定性实验,系统最大引用误差为2.84%,证明系统可以用于在高氯水中对COD进行实时检测。
A study on the measurement of chemical oxygen demand(COD) by UV spectrophotometry method, discusses the research method which combining the design of optical system and electronic technology. The system consists of three parts: optical, circuit, and software. Optical system applies plane diffraction grating and optical slit, which improves the stability of optical signal. Electrical system takes high precision and low quiescent current amplifier OPA2335, improves the conversion accuracy and responding speed of weak light signal. Software system uses chloride and COD standard curve to exclude interference which chloride produces during measuring COD. It is possible to measure COD in high chloride water. Measuring COD standard solution and COD standard solution with chloride ion and measuring actual water sample comparing with HACH-DR6000 besides stability experiment which can prove the system can be used to measure COD in high chloride water.
A study on the measurement of chemical oxygen demand(COD) by UV spectrophotometry method, discusses the research method which combining the design of optical system and electronic technology. The system consists of three parts: optical, circuit, and software. Optical system applies plane diffraction grating and optical slit, which improves the stability of optical signal. Electrical system takes high precision and low quiescent current amplifier OPA2335, improves the conversion accuracy and responding speed of weak light signal. Software system uses chloride and COD standard curve to exclude interference which chloride produces during measuring COD. It is possible to measure COD in high chloride water. Measuring COD standard solution and COD standard solution with chloride ion and measuring actual water sample comparing with HACH-DR6000 besides stability experiment which can prove the system can be used to measure COD in high chloride water.
引文
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[14] 谭淑梅.简析STM32单片机原理及硬件电路设计[J]. 大庆师范学院学报, 2014, 34 (6):21-23.
[15] 张亚东, 刘松. 两种COD测定方法的比较及分析[J]. 北京建筑工程学院学报,2003,19(3):16-19.
[16] 宋福胜.化学需氧量 (COD) 在线监测仪示值误差测量结果不确定度的评定[J]. 大众标准化, 2014(9):57-59.
[2] 陈建军.COD分析中氯离子的影响及分段重铬酸钾法研究[J].工业水处理,2016,36(11):93-96.
[3] 贾琰.高含氯废水中低化学需氧量(COD)检测方法[J].环保科技,2017,23(1):41-46,64.
[4] 迟振龙.水质COD测定中问题的探讨与分析[J].化工管理,2017(24):118.
[5] 王凤,王昂,张玉娜.高氯废水COD快速检测方法探讨[J].信息记录材料,2015,16(2):31-34.
[6] 魏红晓. 紫外分光光度法在化工污水COD测定中的应用分析[J]. 科技创新与应用, 2015(29):69-69.
[7] MA J. Determination of chemical oxygen demand in aqueous samples with non-electrochemical methods[J]. Trends in Environmental Analytical Chemistry, 2017(14):37-43.
[8] 蔡毅飞,宗振庸,侯泽明,等.高氯废水的COD测定方法研究与分析[J].科技资讯,2017,15(16):119-120.
[9] 李茜楠,祁欣.可见分光光度计及化学需氧量检测系统的研究[J].电子测量技术,2015,38(8):113-118.
[10] 朱莉莉,李晖.散射体和吸收体的超声调制光学成像[J].中国激光,2015,42(2):132-137.
[11] 黄荣富,周觅,俞建军, 等. 高氯低COD废水COD测定方法研究[J]. 精细化工中间体, 2014, 44(1):61-63,66.
[12] 许珺. 基于双波长分光光度法染液吸光度检测装置的设计与开发[D]. 杭州:浙江理工大学, 2013.
[13] 李芸. 微弱光电信号检测与采集技术研究[D]. 兰州:兰州交通大学, 2016.
[14] 谭淑梅.简析STM32单片机原理及硬件电路设计[J]. 大庆师范学院学报, 2014, 34 (6):21-23.
[15] 张亚东, 刘松. 两种COD测定方法的比较及分析[J]. 北京建筑工程学院学报,2003,19(3):16-19.
[16] 宋福胜.化学需氧量 (COD) 在线监测仪示值误差测量结果不确定度的评定[J]. 大众标准化, 2014(9):57-59.