Лидер продаж 2024 стресс-тест CV1200 ЭКГ-машина ЭКГ реабилитация оборудование для тестовой беговой дорожки
257 673,74 ₽ - 279 603,42 ₽
Набор реагентов для тестирования воды и водопроводной домашнего использования
- Категория: >>>
- Поставщик: Changchun Wancheng Bio-Electron Co. Ltd.
Сохранить в закладки 1601039327626:
Описание и отзывы
Характеристики
Product Description
Dissolved oxygen (DO) refers to the amount of oxygen dissolved in water, expressed in milligrams of oxygen per liter of water. Oxygen dissolved in water is called dissolved oxygen. Dissolved oxygen exists in a molecular state in water. Dissolved oxygen in water is one of the important indicators of water quality and one of the important factors for water purification. High dissolved oxygen is beneficial for the degradation of various pollutants in the water, thus enabling the water to be purified quickly; On the contrary, the degradation of pollutants in water with low dissolved oxygen is slower.
The dissolved oxygen content in water is affected by two factors: one is the oxygen consumption that causes a decrease in DO, including aerobic organic matter degradation and aerobic biological respiration; Another type of reoxygenation that increases DO mainly involves the dissolution of oxygen in the air, as well as the photosynthesis of aquatic plants using ultrasonic flaw detectors. The mutual growth and decline of these two interactions result in a spatiotemporal variation in the dissolved oxygen content in water.
Dissolved oxygen in water mainly comes from two aspects: on the one hand, when dissolved oxygen (DO) in the water is less than its solubility, oxygen in the atmosphere dissolves into the water. Gas exchange is often carried out at the interface between water and atmosphere. Water releases carbon dioxide into the atmosphere and oxygen dissolves into the water. This is very similar to the respiration of organisms, which is the main source of oxygen in water. On the other hand, aquatic plants release oxygen into the water through photosynthesis. However, due to the frequent occurrence of oxidation in water, which consumes a large amount of oxygen, especially in the degradation of organic matter, there is a continuous process of deoxidation (reduction of dissolved oxygen) and reoxygenation (increase of dissolved oxygen) in the water.
Under natural conditions, when water flows, the process of reaeration is relatively rapid and easy to replenish. The consumption of oxygen in the water can maintain a certain level of dissolved oxygen in the water. Conversely, under static water conditions, the reaeration process is slow and the oxygen content in the water cannot be replenished in a timely manner, resulting in a state of anaerobic state. When industrial wastewater and domestic sewage carry a large amount of organic matter into the water body, the deoxygenation of the water body is severe. Even in flowing river water, the deoxygenation process cannot compensate for such a large degree of deoxygenation, and dissolved oxygen rapidly decreases, causing fish and aerobic organisms to die and water quality to deteriorate. The pollution of water by organic matter and reducing substances can reduce the partial pressure of dissolved oxygen and oxygen in the air. The amount of DO in natural water bodies is not only related to the number of organisms and organic matter in the water, but also to water temperature and water layer. Under normal circumstances, the dissolved oxygen in surface water is 5-10mg/L. In the presence of wind and waves, the dissolved oxygen in seawater can reach up to 14 mg/L. In water bodies where algae thrive, the increase in oxygen release due to photosynthesis may also cause the oxygen in the water to reach supersaturation. Groundwater generally has less dissolved oxygen, and deep water may even have no oxygen.
The content of dissolved oxygen in water is related to factors such as atmospheric pressure, water temperature, and salt content. Dissolved oxygen in unpolluted water is saturated. The dissolved oxygen in clean surface water is close to saturation. When a large number of algae reproduce, dissolved oxygen may become supersaturated. Moderate oxygen is a fundamental condition for the survival and reproduction of fish and aerobic bacteria. The content of dissolved oxygen in a saturated state of fresh water at 0 ℃ and atmospheric pressure is 10mg/L. Fish find it difficult to survive when dissolved oxygen is below 4mg/L. If the organic matter content in water is high and its oxygen consumption rate exceeds the oxygen supply rate, the DO amount in the water will continue to decrease. When the water is polluted by organic matter, the dissolved oxygen in the water can even be close to zero. At this time, organic matter will decompose under anaerobic conditions, leading to fermentation and serious deterioration of water quality. After water is polluted by organic matter, aerobic bacteria oxidize and consume dissolved oxygen. If there is no timely replenishment of oxygen in the air, the dissolved oxygen in water will decrease, ultimately leading to water deterioration. So dissolved oxygen is used as an indicator of the degree of water pollution. The less dissolved oxygen, the more severe the pollution.
The dissolved oxygen content in water is affected by two factors: one is the oxygen consumption that causes a decrease in DO, including aerobic organic matter degradation and aerobic biological respiration; Another type of reoxygenation that increases DO mainly involves the dissolution of oxygen in the air, as well as the photosynthesis of aquatic plants using ultrasonic flaw detectors. The mutual growth and decline of these two interactions result in a spatiotemporal variation in the dissolved oxygen content in water.
Dissolved oxygen in water mainly comes from two aspects: on the one hand, when dissolved oxygen (DO) in the water is less than its solubility, oxygen in the atmosphere dissolves into the water. Gas exchange is often carried out at the interface between water and atmosphere. Water releases carbon dioxide into the atmosphere and oxygen dissolves into the water. This is very similar to the respiration of organisms, which is the main source of oxygen in water. On the other hand, aquatic plants release oxygen into the water through photosynthesis. However, due to the frequent occurrence of oxidation in water, which consumes a large amount of oxygen, especially in the degradation of organic matter, there is a continuous process of deoxidation (reduction of dissolved oxygen) and reoxygenation (increase of dissolved oxygen) in the water.
Under natural conditions, when water flows, the process of reaeration is relatively rapid and easy to replenish. The consumption of oxygen in the water can maintain a certain level of dissolved oxygen in the water. Conversely, under static water conditions, the reaeration process is slow and the oxygen content in the water cannot be replenished in a timely manner, resulting in a state of anaerobic state. When industrial wastewater and domestic sewage carry a large amount of organic matter into the water body, the deoxygenation of the water body is severe. Even in flowing river water, the deoxygenation process cannot compensate for such a large degree of deoxygenation, and dissolved oxygen rapidly decreases, causing fish and aerobic organisms to die and water quality to deteriorate. The pollution of water by organic matter and reducing substances can reduce the partial pressure of dissolved oxygen and oxygen in the air. The amount of DO in natural water bodies is not only related to the number of organisms and organic matter in the water, but also to water temperature and water layer. Under normal circumstances, the dissolved oxygen in surface water is 5-10mg/L. In the presence of wind and waves, the dissolved oxygen in seawater can reach up to 14 mg/L. In water bodies where algae thrive, the increase in oxygen release due to photosynthesis may also cause the oxygen in the water to reach supersaturation. Groundwater generally has less dissolved oxygen, and deep water may even have no oxygen.
The content of dissolved oxygen in water is related to factors such as atmospheric pressure, water temperature, and salt content. Dissolved oxygen in unpolluted water is saturated. The dissolved oxygen in clean surface water is close to saturation. When a large number of algae reproduce, dissolved oxygen may become supersaturated. Moderate oxygen is a fundamental condition for the survival and reproduction of fish and aerobic bacteria. The content of dissolved oxygen in a saturated state of fresh water at 0 ℃ and atmospheric pressure is 10mg/L. Fish find it difficult to survive when dissolved oxygen is below 4mg/L. If the organic matter content in water is high and its oxygen consumption rate exceeds the oxygen supply rate, the DO amount in the water will continue to decrease. When the water is polluted by organic matter, the dissolved oxygen in the water can even be close to zero. At this time, organic matter will decompose under anaerobic conditions, leading to fermentation and serious deterioration of water quality. After water is polluted by organic matter, aerobic bacteria oxidize and consume dissolved oxygen. If there is no timely replenishment of oxygen in the air, the dissolved oxygen in water will decrease, ultimately leading to water deterioration. So dissolved oxygen is used as an indicator of the degree of water pollution. The less dissolved oxygen, the more severe the pollution.
Specification
item | value |
Place of Origin | China |
Province | Jilin |
Brand Name | OEM/Brand/Neutral |
Model Number | W-1AO |
Power Source | Manual |
Warranty | 2 years |
After-sale Service | Online technical support |
Material | Plastic |
Shelf Life | 2 years |
Quality Certification | CE |
Instrument classification | Class II |
Safety standard | None |
Product name | Free Chlorine Test Reagents Kit |
Function | 99.7% |
Certificate | CE |
Accuracy | 99.96% |
MOQ | 10 Sets |
Advantage | Quick Testing |
OEM/ODM | Acceptable |
Specification | 15ml/bottle, 3 Bottles per Box |
Reaction time | 30s |
Sorage | 15-20°C |
Packing & Delivery
To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.
Company Profile
Changchun Wancheng Bio-Electron Co., Ltd. was established in 2002 with a registered capital of 20 million. We mainly specialized in the development, production and sales of health & medical products and home test kits. Our factory covers an area of 30,000 square meters, which has achieved fully automated production. 8 production lines enable us to produce 40,000 barrels strips per day, and its production capacity ranks top in the country. At present, our company has obtained over 40 national invention and utility model patents. Wancheng's products have won the EU CE, ISO 9 0 0 1, ISO 1 3 4 8 5 and CGMP certifications. And we have conducted strategic cooperations with many well-known companies in domestic and abroad. We did the private design for their own brand. We transform customers needs into productivity at the first time.
Our main products cover urine test strips, water test strips, rapid test kits, home health test kits, urine analyzers, hematology analyzers and other reagents. For urine testing, we can test 1-14 parameters. For water quality testing, we cover drinking water test, pool water test and aquarium test series. All test strips and instruments we produced can provide O E M&O D M services. We have customers in more than 120 countries and regions and world-class quality makes us win the loyalty and reputation from all over the world. Hope we can do cooperation now! Thank you.
Our main products cover urine test strips, water test strips, rapid test kits, home health test kits, urine analyzers, hematology analyzers and other reagents. For urine testing, we can test 1-14 parameters. For water quality testing, we cover drinking water test, pool water test and aquarium test series. All test strips and instruments we produced can provide O E M&O D M services. We have customers in more than 120 countries and regions and world-class quality makes us win the loyalty and reputation from all over the world. Hope we can do cooperation now! Thank you.
FAQ
1. who are we?
We are based in Jilin, China, start from 2002,sell to North America(50.00%),Western Europe(25.00%),South America(15.00%),Eastern Europe(10.00%). There are total about 51-100 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Urine (Saliva) Test Strip/ Rapid test Strip, Urine Analyzer/ Hematology Analyzer, Water Test Strip
4. why should you buy from us not from other suppliers?
Changchun Wancheng Bio-Electron Co., Ltd. was established in 2002 with a registered capital of 20 million. We mainly specialized in the development, production and sales of health & medical products and home test kits. We provide OEM&ODM services.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES；
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese,Russian
We are based in Jilin, China, start from 2002,sell to North America(50.00%),Western Europe(25.00%),South America(15.00%),Eastern Europe(10.00%). There are total about 51-100 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Urine (Saliva) Test Strip/ Rapid test Strip, Urine Analyzer/ Hematology Analyzer, Water Test Strip
4. why should you buy from us not from other suppliers?
Changchun Wancheng Bio-Electron Co., Ltd. was established in 2002 with a registered capital of 20 million. We mainly specialized in the development, production and sales of health & medical products and home test kits. We provide OEM&ODM services.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES；
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese,Russian
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