In water quality testing laboratories, COD (Chemical Oxygen Demand) is a fundamental and critical indicator. It reflects the total amount of reducing substances in the water body and is an important reference parameter for measuring the degree of water pollution. In the COD determination process, the importance of the "digestion" step is often underestimated.

A stable Shanghai Yetuo COD digestion instrument is often the key equipment that determines experimental efficiency and result reliability.

Why choose "aluminum block type"?

Compared to traditional oil bath heating or water bath digestion methods, aluminum block heating is becoming mainstream, especially in daily high-frequency detection, with increasingly obvious advantages:

Uniform temperature distribution: Aluminum material has excellent thermal conductivity, which can maintain consistent temperature distribution throughout the entire digestion hole, avoiding the problem of "incomplete reaction of some samples".

Heating is faster and temperature control is more stable: it heats up when powered on, with an adjustable temperature curve and a PID intelligent temperature control system, making heating more efficient and the process more controllable.

Clean and tidy, no need for liquid media: no oil fumes, no splashes, maintenance free, more suitable for long-term storage and use in the laboratory.

Support batch processing: Common designs support sample positions of 6, 12, or even 25 or more holes, suitable for daily environmental monitoring, sewage treatment plant inlet and outlet water testing, and other scenarios.

What detection scenarios are applicable?

Surface water and groundwater monitoring

Daily detection of domestic sewage and industrial wastewater

Teaching experiments in universities and research institutions

Third party water quality testing service providers

Especially when implementing the "HJ 828-2017 Determination of Chemical Oxygen Demand for Water Quality - Dichromate Method", the aluminum block COD digestion instrument can well meet the temperature control requirements in the standard (165 ± 1 ℃, 30 minutes), providing stable digestion conditions for subsequent titration or colorimetric analysis.

Simple operation, suitable for teaching and daily use

Aluminum block digestion equipment is usually equipped with functions such as timing, temperature control display, and over temperature protection. The button layout is reasonable and the settings are simple, so even beginners can quickly master the usage method.

More importantly, the instrument does not require frequent maintenance and has a long service life, making it particularly suitable for units with large sample sizes and high detection frequencies.

Conclusion:

The Shanghai Yetuo aluminum block COD digestion instrument is like a "small furnace" in the laboratory, but it not only brings high temperature, but also the stability and repeatability behind the data. In the determination of chemical oxygen demand, digestion is the stable foundation, and this equipment is a key step in making the "foundation" reliable and controllable.