Total nitrogen is a common detection indicator in water quality analysis. However, some customers have asked why total nitrogen is so difficult to measure? This article will provide a simple analysis on this topic regarding the difficulty of measuring total nitrogen!

In wastewater and sewage, total nitrogen content is an important indicator for measuring water quality. It refers to the total amount of inorganic and organic nitrogen in water. It is mainly used to indicate the degree of pollution of water bodies by nutrient substances. The purpose of monitoring it is to help assess the pollution and self-purification status of water bodies.

For example, in surface water, if nitrogen and phosphorus levels exceed the standard, microorganisms will multiply in large numbers, leading to a proliferation of plankton and a state of eutrophication. Therefore, it is necessary to test the total nitrogen in water using a Water Quality Detector! But why is total nitrogen difficult to measure? In fact, whether total nitrogen is difficult to measure depends on the situation. It is not the case that the total nitrogen in wastewater is always difficult to measure. It is closely related to the detection key points. Therefore, specific analysis needs to be conducted based on the specific situation!

What Methods can be Used to test Total Nitrogen in Eater? There are Deveral Methods!

1.Gas-phase molecular absorption spectroscopy;

2.Alkaline potassium persulfate ultraviolet spectrophotometry. This method is currently the main method for Online Water Quality Monitoring. The TN-8000 Total Nitrogen Online Analyzer produced by Hangzhou Modiuses this method.

3.There are also methods for separately detecting nitrate ions, ammonia nitrogen, etc., and then accumulating and adding the results as the measurement value of total nitrogen;

Where are the main monitoring points? They can be divided into six points:

· The preparation of reagents is very important. Improper preparation will directly affect the digestion effect;

· The washing of glassware should be carried out using reasonable methods;

· Do a good job in the control of digestion stability and pressure;

· Pay attention to the issues to be noted during colorimetry, such as: wavelength issues. It is recommended to use the same wavelength after determining a set of samples;

· In choosing reagents, purity is very important. It directly affects the blank value and the accuracy of the detection results;

· Regarding the quality inspection of experimental water and reagents, if the blank value is not ideal, it is necessary to test the experimental water and reagents, thereby selecting water and reagents with low nitrogen content and obtaining an appropriate blank value.