1、 Execution standards:
Compliant with《HJ/T 399-2007The requirements for the determination of chemical oxygen demand in water quality by rapid digestion spectrophotometry.
2、 Technical principle:
This instrument is a pre treated heating reflux device for analyzing COD (chemical oxygen demand) in wastewater; Using aluminum block heating for sample digestion; It consists of a heating module and a temperature control module. Taking COD as an example, according to the experimental method, the sample is heated to 165 ℃ and maintained at a constant temperature for 15 minutes to complete the COD rapid digestion step.
3、 Application scope:
1. Widely used for water quality testing in industries such as sewage treatment plants, monitoring stations, environmental protection bureaus, third-party testing, petrochemicals, steel mills, power plants, healthcare, universities, and production-oriented enterprises (including food mills, paper mills, printing and dyeing factories, etc.); Suitable for testing the water quality of surface water, groundwater, industrial wastewater, domestic sewage, tap water, etc.
2. It can be used in conjunction with a spectrophotometer or a COD analyzer produced by Haijing to conduct digestion experiments on various substances such as COD, total phosphorus, and total nitrogen.
4、 Technical parameters:
1. Adjustable temperature range: Room temperature -200 ℃
2. Temperature control error: ≤ 0.5℃
3. Heating speed: 170 ℃ ≤ 10min (calculated based on COD experimental temperature)
4. Batch heating sample quantity: 9, 12 or 25
5. COD measurement range: 5-100mg/L surface water can be directly measured
50-1000mg/L of domestic sewage can be directly measured
500-6000mg/L production wastewater can be diluted and measured
6. Anti chlorine interference: ≤ 1000mg/l
7. Dissolving time: adjustable from 0-720 minutes, general COD digestion time: 15 minutes, total phosphorus and total nitrogen time: 30 minutes
8. Power supply and power consumption: AC220V； 0.5kw
9. Applicable test tube: diameter of 16mm, heating hole depth of 8cm
10. Host size: 230mm × 290mm × 110mm (length * width * height)
11. Weight: 6kg
5、 Functional features:
1. Adopting a new type of temperature controller, the heating speed is fast, the accuracy is high, and the temperature is constant and uniform.
2. It can automatically complete the constant temperature timing, with automatic alarm function when it arrives, automatic shutdown, and achieve unmanned operation.
3. Sealed digestion can effectively reduce errors.
4. It has the advantages of small size, water-saving, time-saving, energy-saving, and good temperature control performance.
6、 Configuration List:
One digestion host, 9/12/25 sealed digestion tubes, one test tube rack, one protective cover, one power cord, and one certificate of conformity, warranty card, and instruction manual.