Industry News
-
Determination of residual chlorine/total chlorine by DPD spectrophotometry
Chlorine disinfectant is a commonly used disinfectant and is widely used in the disinfection process of tap water, swimming pools, tableware, etc. However, chlorine-containing disinfectants will produce a variety of by-products during disinfection, so the safety of water quality after chlorinatio...Read more -
Introduction to DPD colorimetry
DPD spectrophotometry is the standard method for detecting free residual chlorine and total residual chlorine in China’s national standard “Water Quality Vocabulary and Analytical Methods” GB11898-89, jointly developed by the American Public Health Association, the American Wate...Read more -
The relationship between COD and BOD
Speaking of COD and BOD In professional terms COD stands for Chemical Oxygen Demand. Chemical Oxygen Demand is an important water quality pollution indicator, used to indicate the amount of reducing substances (mainly organic matter) in the water. The measurement of COD is calculated by using str...Read more -
Water quality COD determination method-rapid digestion spectrophotometry
The chemical oxygen demand (COD) measurement method, whether it is the reflux method, the rapid method or the photometric method, uses potassium dichromate as the oxidant, silver sulfate as the catalyst, and mercury sulfate as the masking agent for chloride ions. Under the acidic conditions of su...Read more -
How to make COD testing more accurate?
Control of COD analysis conditions in sewage treatment 1. Key factor—representativeness of the sample Since the water samples monitored in domestic sewage treatment are extremely uneven, the key to obtaining accurate COD monitoring results is that the sampling must be representative. To achie...Read more -
Turbidity in surface water
What is the turbidity? Turbidity refers to the degree of obstruction of a solution to the passage of light, which includes the scattering of light by suspended matter and the absorption of light by solute molecules. Turbidity is a parameter that describes the number of suspended particles in a li...Read more -
What is residual chlorine in water and how to detect it?
The concept of residual chlorine Residual chlorine is the amount of available chlorine remaining in the water after the water has been chlorinated and disinfected. This part of chlorine is added during the water treatment process to kill bacteria, microorganisms, organic matter and inorganic matt...Read more -
Summary of analysis methods for thirteen basic indicators of sewage treatment
Analysis in sewage treatment plants is a very important operation method. The analysis results are the basis for sewage regulation. Therefore, the accuracy of the analysis is very demanding. The accuracy of the analysis values must be ensured to ensure that the normal operation of the system is c...Read more -
BOD5 analyzer introduction and the dangers of high BOD
The BOD meter is an instrument used to detect organic pollution in water bodies. BOD meters use the amount of oxygen consumed by organisms to break down organic matter to assess water quality. The principle of the BOD meter is based on the process of decomposing organic pollutants in water by bac...Read more -
Overview of various commonly used water treatment agents
The Yancheng water crisis following the blue-green algae outbreak in Taihu Lake has once again sounded the alarm for environmental protection. At present, the cause of the pollution has been initially identified. Small chemical plants are scattered around the water sources on which 300,000 citiz...Read more -
How high is the salt content that can be treated biochemically?
Why is high-salt wastewater so difficult to treat? We must first understand what high-salt wastewater is and the impact of high-salt wastewater on the biochemical system! This article only discusses the biochemical treatment of high-salt wastewater! 1. What is high-salt wastewater? High-salt wast...Read more -
Introduction to commonly used water quality testing technologies
The following is an introduction to the test methods: 1. Monitoring technology for inorganic pollutants Water pollution investigation starts with Hg, Cd, cyanide, phenol, Cr6+, etc., and most of them are measured by spectrophotometry. As environmental protection work deepens and monitoring servic...Read more
