The portable multi-parameter water quality analyzer is a new type of instrument that can detect water quality at the same time and quickly. It is easy to operate and accurate. It can be used simultaneously with the matching reagents. It can be quickly obtained without setting standard solution and drawing standard curve, which is convenient for field sampling.
R&D background
Water is the source of life. Human beings are inseparable from water in their daily 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 water quality requirements for drinking water have been continuously improved, and drinking water quality standards have been continuously developed and improved accordingly. Portable multi-parameter water quality analyzer does not need to prepare standard solution and draw standard curve when using matching reagents. It can directly put sample or diluted solution into the instrument for quantitative water quality testing. The water quality test results are accurate and easy to operate. With the rapid development of China's social economy, the acceleration of urbanization and industrialization, the problem of water pollution has become increasingly prominent, and water quality monitoring has become more and more important. The portable water quality detector is small in size, light in weight and convenient to carry. Multi-parameter water quality testing is an important development direction. According to the requirements of portable multi-parameter water quality detectors, research on key technologies such as signal acquisition 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 test
Tap water refers to the water purification process of fresh water from rivers and lakes through "coagulation, sedimentation, filtration, disinfection", etc., and finally the pump supplies water to the users through the water distribution pipeline. Some countries and regions stipulate that they must meet the national standards for drinking water hygiene.
Portable multi-parameter water quality tester water quality testing is not up to standard, it is easy to cause diarrhea, cholera, typhoid, hepatitis, dysentery and other infectious diseases and fluorosis, arsenic poisoning and other endemic diseases.
National standard
National standards stipulate that total coliforms (MPN/100mL or CFU/100mL) should not be detected; heat-resistant coliforms (MPN/100mL or CFU/100mL) should not be detected; Escherichia coli (MPN/100mL or CFU) /100mL) shall not be detected; the total number of colonies (CFU/mL) is 100.
The chromaticity is not more than 15 degrees; the turbidity NTU is not more than 3 degrees; the smell and smell must not have odor and odor; the visible matter must not be contained; 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 (based on phenol) g/L 0.002; anionic synthetic detergent g/L 0.3; sulfate g/L 250; Compound g/L 250; total dissolved solids g/L 1000; fluoride g/L 1.0; cyanide g/L 0.05; chloroform g/L 60; total number of bacteria / L 100; total coliforms / L 3 ; residual chlorine g / L ≥ 0.30.
Chlorination
Most of tap water disinfection uses chlorination. Chlorine gas is used for tap water disinfection with good disinfection effect, low cost and almost no harmful substances. However, after understanding and researching the theoretical data, we believe that chlorine is still used in tap water disinfection. Chlorinated sterilized tap water can produce carcinogens, and experts have also proposed many improvement measures.
The world's safe tap water disinfection method is ozone disinfection, but the treatment of this method is too expensive, and the ozone-treated water has a limited retention time. As for how long it can be retained, there is no exact concept. . Therefore, only a few developed countries use this treatment.
Influencing factor
The factors that can affect water quality testing during the detection of water quality using a portable multi-parameter water quality tester are mainly 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 sample to be tested, which will result in the failure to correctly analyze the water quality results, which will not 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 groundwater quality are quite different. The water quality of the ground can be preliminarily sampled by changes in water level, flow rate and flow direction of the water body, coastal city distribution, industrial layout, pollution sources and their sewage discharge, and urban water supply and drainage. However, the collection of groundwater quality is not applicable to this method. It needs to collect water samples according to urban development, industrial distribution, and land utilization in the water quality area. If you do not correctly recognize the difference in water quality, it will affect the correctness of the results of water quality testing. We know that water resources are limited, and water resources are not inexhaustible. Therefore, we must pay attention to the relationship between water conservation and development and utilization. China has put forward the overall requirements for building a conservation-oriented society. The Regulations on Water Conservation Management are also under intense drafting. It should be used as an opportunity to actively promote water-saving technologies, actively promote water-saving awareness, and vigorously improve water use efficiency. At the same time, strict control of the total amount of water, while the implementation of water quota control. According to the distribution range and carrying capacity of water resources, correctly guide the industrial industry aggregation mode, strengthen water resources protection while reducing expenditure, vigorously improve the water environment and water quality, increase the total amount of water resources available, and increasingly Prominently, it is necessary to use a portable multi-parameter water quality tester to detect water quality, and to implement effective open source measures in areas with relatively abundant water.
Case Analysis
The instrument is suitable for analysis and measurement of nearly forty parameters in surface water, groundwater, industrial wastewater and other water quality under various environmental conditions such as laboratory or in the field. It has laboratory-level accuracy and low accuracy. The advantages of price consumables and flexible configuration.
* Based on international and domestic water quality monitoring standards, combined with the advantages of HANNA technology.
* Widely used in a variety of water quality analysis such as surface water, groundwater, industrial wastewater.
* Measurements include nearly 40 parameters such as turbidity, residual chlorine, total chlorine, ammonia nitrogen, phosphate, nitrate, hexavalent chromium and cyanide.
* Suitable for both laboratory and field use, fast and accurate measurement.
* Fully equipped, compact design, easy to carry.
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