基于非分散红外吸收的总有机碳检测仪研制
Total Organic Carbon Analyzer Using Non-Dispersive Infrared Absorption Method
摘要
总有机碳是以碳的含量来表示水体中有机物总量的综合指标,比化学需氧量等参数更能准确反映有机污染程度。根据CO2气体对红外光的吸收与其浓度的关系符合Lambert-Beer定律,研制了一种非分散红外法总有机碳检测仪。该仪器能将待检测的水样导入反应器,水样中有机物被氧化成CO2,非分散红外模块检测到的CO2浓度与水样中总有机碳浓度具有良好的对应关系。具体论述了该仪器的工作流程、分析方法和数据处理方法。测试结果表明仪器的检测下限优于0.5 mg/L。该仪器可以为污染减排工作提供可靠的数据支持,完善污染物总量减排监测体系建设。
Abstract
Total organic carbon is an indicator for evaluation of organic pollutants in water, and it is more appropriate than chemical oxygen demand. A total organic carbon analyzer using non-dispersive infrared absorption method according to Lambert-Beer law and temperature catalytic oxidation techniques is developed. The CO2 concentrations which detected by non-dispersive infrared module has a good correspondence between total organic carbon concentrations in water. The details about the operation sequence, the constructions and data processing methods are discussed. The measurement results show that the detection limit of the instrument is under than 0.5 PPM. The analyzer can provide reliable data to support pollution emission reduction project.
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