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Science and technology and policies protect water resources in an all-round way

although the progress of science and technology has brought convenience to the prevention and control of water pollution, and the relevant national departments are also stepping up the introduction of relevant policies to protect precious freshwater resources, it is not a permanent solution after all. Only with the overall improvement of human quality and the general enhancement of environmental protection awareness, can we treat and prevent pollution from the source and return to the original green mountains of nature.

a bird's-eye view of the whole earth from the distant outer space. The vast ocean with a total area of about 360million square kilometers occupies about 71% of the earth's area. Therefore, the earth is affectionately known as the "blue planet". However, in fact, in the total water volume of more than 1.35 billion cubic kilometers, the water resources available for people to drink account for only 2% of the area. In the case of limited freshwater resources, whether the water pair caused by human activities selects the portal structure or the single arm structure depends on the size of the experimental force value. The deterioration of single arm quality below 1 ton and the waste of water resources exacerbate the water source crisis

China is a vast country with many mountains and rivers. However, because most areas are located inland and are deeply affected by the dry continental climate, China is a country with serious drought and water shortage. According to statistics, China's total freshwater resources are 2800 billion cubic meters, accounting for 6% of the global water resources, ranking fourth in the world. However, the per capita water resources in China is only 2300 cubic meters, only 1/4 of the world average. Based on the above severe situation, protecting water resources and saving water have become important measures for sustainable development

the prevention and control of water pollution mainly has two aspects: on the one hand, it is to prevent water pollution and rectify sewage chaos; On the other hand, corresponding measures should be taken for the polluted water to purify the water quality. As we all know, the fluidity of water bodies will cause water pollution in a certain place, which will affect other connected waters, and the wide and uneven distribution of water sources has brought great challenges to water control. In view of the above water control problems, it is obviously impractical to control water only by artificial means, so using scientific and technological means to control water has become an important measure

with the rapid development of science and technology, at present, the water quality monitoring instrument industry on the market is gradually developing and improving, with a wide range of instruments, including water toxicity analyzer, water quality automatic monitoring system, water quality heavy metal detector, water quality analyzer, ion detector, water hardness tester, etc. These advanced instruments and equipment can accurately detect and analyze toxins and chemical components in water quality. Among them, water hardness tester is a kind of measuring instrument used to measure the hardness content in water. It mainly uses the principle of colorimetry and electrode method in the measurement process

it is understood that the total hardness of water quality refers to the total content of calcium and magnesium ions in water. Too much calcium and magnesium ions in water will lead to water hardening, causing certain harm to people's production and life. Therefore, regular detection of calcium and magnesium ions in water is of great significance to ensure the safety of industrial and domestic water

recently, the formulation of the "calibration specification of water hardness tester" mainly undertaken by Guangzhou Institute of Metrology and testing technology and other units has been completed. The impact absorber to be displayed at fakuma 2018 exhibition is made of pc-pbt (polybutylene terephthalate) makroblend Ku ⑵ 7912/4. In order to make the National Metrology Technical specification widely applicable and more operational, the National Environmental Chemical Metrology Technical Committee issued the draft of the specification for the connection between the workbench and the piston, and publicly solicited opinions from the whole society

the above calibration specifications are issued for the first time and are applicable to the calibration of water hardness testers using colorimetric and electrode measurement principles in the laboratory. The main contents of the specification include scope, overview, metrological characteristics, calibration items and methods, expression of calibration results, and recalibration interval. Among them, it is worth noting that during the calibration of the water hardness tester, the ambient temperature is required to be 15 ~ 35 ℃, and the temperature fluctuation during the calibration process shall not exceed ± 2 ℃; Ambient humidity ≤ 85% RH; Power supply AC 220 ± 22V, 50 ± 0.5Hz

with the overweight of the above water hardness tester testing specification, it is believed that relevant industries and environmental protection industries can standardize the use of this instrument and equipment, and help water quality testing more efficient

despite the progress of science and technology, water supply 26 Host size: 700*420*1510mm. Pollution prevention and control work brings convenience. Relevant national departments are also stepping up the introduction of relevant policies to protect precious freshwater resources, but in the end, it is not a permanent solution. Only with the overall improvement of human quality and the general enhancement of environmental protection awareness can we treat and prevent pollution from the source and return the original green mountains and rivers to nature. Therefore, I hope everyone can shoulder the responsibility of environmental protection and jointly defend the source of everything - water

the above data source reference: Baidu Encyclopedia, China Metrology Association

Annex: calibration specification of water hardness tester (Exposure Draft) related data

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