Turbidity compensation method for optical water quality detection as well as application and device for detecting COD (Chemical Oxygen Demand)

• Main Authors: CHEN WEI, HUANG DANGUANG, SHAO WUJIE, HUANG MINGZHU, LIN JIADI
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a turbidity compensation method for optical water quality detection as well as application and a device for detecting COD (Chemical Oxygen Demand). The turbidity compensation method has the advantages that the absorbance of detected liquid in ultraviolet-visible-infrared bands is comprehensively analyzed; the extracted absorbance of a plurality of visible-infrared typical wavelengths can be used as the absorbance contribution value of the turbidity of the detected liquid at the visible-infrared typical wavelengths, and then a relational expression between the absorbance contribution value of the turbidity and the wavelengths is established through a plurality of data fitting methods; and selecting an optimal relational expression according to the optimal fitting goodness to calculate the absorbance contribution value of the turbidity at the ultraviolet key wavelength, and carrying out differential operation on the total absorbance of the ultraviolet key wavelength extracted in advance