Model recommendation: tw-ss1s, tianyu environment, professional instrumentation) portable cod is a portable instrument for the rapid detection of chemical oxygen requirements (cods) in water bodies and is widely used in such areas as environmental monitoring, sewage treatment and industrial wastewater discharge control。
I. Rationale
Portable cod metrics for water quality are mainly based on the potassium chromosomal acid method (quick catalyst dissociation spectrometry):
Decomposition response: in a highly acidic environment, with potassium chromium acid as an oxidizer, silver sulphate as a catalyst, and at high temperatures (usually 150°c-165°c), organic matter in water samples is oxidized to co2 and water. During the response, hexavalent chromium (cr6+) was restored to trivalent chromium (cr3+) and the solution colour changed from yellow to blue green。
Pyrometric measurement: cr3+ sorbent in the digested solution (usually 600-620 nm wavelength) is measured by spectrophotometry and cod values are calculated according to lambert-bill law。
Core characteristics
Quick detection: traditional methods take two hours to dissolve and portable instruments reduce the elimination time to 10-30 minutes by optimizing catalysts and response conditions, significantly improving detection efficiency。
Portability: application of light quantitative designs (e. G., weight 2kg), high-capacity lithium batteries or support for various modes of power supply (e. G., smoke lighters, general batteries) to non-fixed power source scenarios such as field, sewage vents, etc。
High precision and stability: some models use imported optical systems (e. G., neptunium lantern lifetime) 5,000 hours)
Smart function:
The built-in gps positioning module, which synchronizes data upload to the cloudy platform, achieves a three-dimensional tracer of "data-location-time"。
Support for bluetooth/wifi transmission, which connects mobile phones to ap or computers to produce detection reports in real time and print。
Automatically calibrated light circuits to reduce human error。
Multi-parameter integration: multiple indicators of cod, ammonia, total phosphorus, turbidity, etc. Can be detected simultaneously to meet complex water quality assessment needs。
Iii. Applications
Environmental monitoring:
Daily patrols and emergency monitoring of natural water bodies such as rivers, lakes, reservoirs (e. G., trace sources of pollution from tanker spills)。
Water quality is quickly screened at key nodes such as sewage vents and estuaries。
Sewage treatment:
Sewage treatment plants monitor access to water vents on a real-time basis to guide process adjustments (e. G. Exposure, pharmaceutical additives) to improve treatment efficiency。
Network water quality surveys to identify leakage or illegal discharge points。
Industrial wastewater management:
Wastewater discharge monitoring in the chemical, oil, paper and metallurgy industries to ensure compliance。
Water quality management in the enterprise's internal circulatory water system, extending the useful life of the equipment。
Other areas:
Water quality surveys in the management of black water bodies in rural areas。
Experiments in water quality analysis at scientific and educational institutions。
Daily water quality checks in public places, such as swimming pools。
