Shen ChangHong
To be a supplier of high quality
laboratory analytical instruments in China.
Shen ChangHong
To be a supplier of high quality
laboratory analytical instruments in China.
The Nessler's colorimetry is used to measure the ammonia nitrogen in the water by the ammonia nitrogen analyzer. The method has the characteristics of simple operation and high sensitivity. The principle is that the ammonia nitrogen in the form of free ammonia or ammonium ion reacts with sodium reagent to form a yellow brown complex, and the chroma of the complex is directly proportional to the content of ammonia nitrogen. What are the precautions for measuring ammonia nitrogen with the ammonia nitrogen tester?
The performance of water quality analysis instruments in the Chinese market is far better than that in the past few years, and it is expected to grow rapidly in the next five years. The main reasons for the growth of analytical instruments in China include the booming pharmaceutical industry and the emphasis on sewage treatment; the rising demand for water and the aggravation of water pollution drive the demand for water quality analytical instruments in China.
According to different test standards, ammonia nitrogen tester has a and B types. Among them, type A uses Nessler's Reagent Colorimetry gb7479-87; type B uses salicylic acid photometry as the basic test method in accordance with national standard gb7148-81 and international iso7150 / 1-1948, supplemented by sample colorimetric reaction pretreatment, to achieve rapid and accurate colorimetric determination of samples, which has the advantages of stability, sensitivity, reliability and mercury free.
As a measure of the quality of water ecological environment, the water quality monitoring equipment industry is speeding up the creation of new formats and showing an explosive growth trend. According to the report of authoritative media, the scale of water quality monitoring equipment industry last year exceeded 8.7 billion yuan, an increase of 12%, and it is expected to reach nearly 10 billion yuan in 2018. At the same time, China's water quality monitoring industry has entered a period of vigorous development, with an average annual growth rate of 10% since 2013.
We have done water quality monitoring in China for more than ten years, and feel that the pressure of environmental management is gradually increasing. Monitoring environmental quality changes need a large number of data as support, which is big data, and the traditional environmental monitoring laboratory testing indicators and frequency can not meet the requirements of the present. In addition, the sudden pollution events in recent years, such as the news exposed in Lanzhou, Jinjiang, Wuhan and other places, are discovered by the citizens first. In this process, the application of automatic water quality monitoring system is very necessary. In recent years, it is more gratifying that the monitoring instruments for domestic water stations have gradually realized localization, but we think there are still many problems.
In order to implement the environmental protection law of the people's Republic of China, the law of the people's Republic of China on the prevention and control of water pollution and the law of the people's Republic of China on the protection of the marine environment, protect the ecological environment, protect human health and standardize the technical requirements for sewage monitoring, the Ministry of biological environment approved and issued the technical specifications for Sewage Monitoring (HJ) on December 24, 2019 91.1-2019), from March 24, 2020.
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