Analysis of R & D background examples of multi-parameter water quality analyzer
The portable multi-parameter water quality tester is a new type of instrument that can detect water quality simultaneously and quickly, with easy operation and accurate results. Can be used at the same time with matching reagents, without the need to configure standard solutions and draw standard curves, you can quickly get the results, which is convenient for field sampling.
R & D background
Water is the source of life. Human beings are inseparable from life and production activities. The quality of drinking water is closely related to human health. With the development of social economy, scientific progress and the improvement of people's living standards, people's requirements for the quality of drinking water continue to increase, and the standards for drinking water quality have been continuously developed and improved accordingly. The portable multi-parameter water quality tester does not need to prepare a standard solution and draw a standard curve when using the matching reagents. You can directly put the sample or diluted solution into the instrument for quantitative water quality detection. The water quality test results are accurate and the operation is simple. With the rapid development of China's social economy and the acceleration of urbanization and industrialization, the problem of water pollution has become increasingly prominent, and water quality monitoring has become increasingly important. The portable water quality detector is small in size, light in weight and easy to carry. Multi-parameter water quality detection is its important development direction. According to the requirements of portable multi-parameter water quality detectors, research on key technologies such as signal collection and transmission of portable multi-parameter water quality detectors has a wide range of application requirements.
Seawater detection
The portable multi-parameter water quality tester can also be used for marine water quality monitoring. It can simultaneously measure seven parameters of seawater temperature, depth, salinity, chlorophyll concentration, turbidity, dissolved oxygen and pH.
Tap water detection
Basic definition
Tap water refers to the water plant that passes the fresh water of rivers and lakes through "coagulation, precipitation, filtration, disinfection" and other water purification processes, and finally the machine pump supplies the user's water through the water distribution pipeline. Some countries and regions stipulate that they must meet the national sanitary drinking water standards.
The portable multi-parameter water quality tester does not meet the standards for water quality, which can easily cause infectious diseases such as diarrhea, cholera, typhoid fever, hepatitis, dysentery and endemic diseases such as fluorosis and arsenic poisoning.
Folding national standard
National standards stipulate that total coliforms (MPN / 100mL or CFU / 100mL) shall not be detected; heat-resistant coliforms (MPN / 100mL or CFU / 100mL) shall not be detected; Escherichia coli (MPN / 100mL or CFU) shall not be detected / 100mL) shall not be detected; the total number of colonies (CFU / mL) is 100.
Chromaticity does not exceed 15 degrees; turbidity NTU does not exceed 3 degrees; smell and smell must not have odors and smells; visible substances must not contain; PH 6.5-8.5; total hardness (calculated as CaCO3) mg / L 450; iron mg / L 0.3; manganese mg / L 0.1; copper mg / L 1.0; zinc mg / L 1.0; volatile phenol (calculated as phenol) g / L 0.002; anionic synthetic detergent g / L 0.3; sulfate g / L 250; chlorine G / L 250; total dissolved solids g / L 1000; fluoride g / L 1.0; cyanide g / L 0.05; chloroform g / L 60; total bacteria / L 100; total coliforms / L 3 ; Residual chlorine g / L ≥ 0.30.
Chlorination disinfection
Most of the tap water disinfection adopts the chlorination method. Chlorine gas used for tap water disinfection has the advantages of good disinfection effect, low cost and almost no harmful substances. However, after understanding and researching the theoretical data, we believe that chlorine gas still has certain disadvantages in the disinfection of tap water. The tap water after chlorination can produce carcinogens, and experts have also proposed many improvement measures.
The safest tap water disinfection method in the world is ozone disinfection, but the treatment cost of this method is too expensive, and the retention time of ozone-treated water is limited. As for how long it can be retained, there is no definite concept. . So only a few developed countries use this method.
Influence factor
In the process of using portable multi-parameter water quality tester to detect water quality, the main factors that can affect the water quality detection are source factors and category factors. The first is the source factor. In the usual work, sometimes the staff will mistake the source of the water quality sample to be tested, which will lead to the inability to correctly analyze the water quality results, resulting in the failure to provide a solution to the problem. Secondly, different water quality testing methods should be adopted for different water quality samples. For example, the detection methods used for ground water quality and ground water quality are very different. The surface water quality can be preliminarily sampled by the changes of water level, velocity and direction of the water body as well as the distribution of cities along the coast, industrial layout, pollution sources and their discharge, urban water supply and drainage, etc. However, the collection of groundwater quality is not suitable for this method. It needs to collect water samples according to the urban development, industrial distribution, land utilization, etc. in the water quality area. If you do not correctly recognize the differences in various types of water quality, it will affect the accuracy of the results of water quality testing. We know that the amount of water resources available is limited, and water resources are not inexhaustible and inexhaustible. Therefore, we must pay attention to the relationship between water conservation and development and utilization. China has already put forward the general requirements for building a conservation-minded society, and the "Regulations for Water Conservation Management" is being drafted intensively. It should be used as an opportunity to actively promote water-saving technologies, actively promote water-saving awareness, and vigorously improve the efficiency of water resources utilization At the same time, strictly control the total amount of water used, and implement water quota control. According to the distribution range and carrying capacity of water resources, correctly guide the way of industrial industry aggregation, while saving money, strengthen the protection of water resources, vigorously improve the water environment and quality of water resources, increase the total amount of available water resources Prominently, it is necessary to use portable multi-parameter water quality testers to detect water quality, and effective open source measures are implemented in regions with relatively abundant water.
Case Analysis
The instrument is suitable for analysis and measurement of nearly forty parameters in various water qualities such as surface water, groundwater, industrial wastewater, etc. under harsh environmental conditions such as laboratory or field, with laboratory-level accuracy, low Price consumables and flexible configuration advantages.
* According to international and domestic water quality monitoring specifications, combined with HANNA technical advantages, elaborate design.
* Widely used in surface water, groundwater, industrial wastewater and other water quality analysis.
* The measurement includes nearly 40 parameters including turbidity, residual chlorine, total chlorine, ammonia nitrogen, phosphate, nitrate, hexavalent chromium and cyanide.
* It is suitable for laboratory and field use at the same time, the measurement is fast and accurate.
* Comprehensive configuration, compact design, easy to carry.
Portable multi-parameter water quality measuring instrument 326953
Comprehensive elaboration
The comprehensive colorimetric multi-parameter measuring instrument can measure more than 37 water quality monitoring items such as high-precision turbidity, residual chlorine, total hexavalent chromium, and cyanide.
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