1、 Execution standards:
COD microwave digestionThe instrument complies with national standardsHJ 828-2017Requirements for the determination of chemical oxygen demand in water quality using the dichromate method.
2、 Technical principle:
This instrument is a microwave sealed COD digestion treatment device, which is currently a relatively new type of chemical oxygen demand pretreatment device in China. The instrument adopts a microwave energy heating method with a frequency of 2450MHz. Under its action, dipole molecules in the reactants in the digestion system will rotate at high speed, forming intense friction and collision, causing the temperature of the reactants to rapidly rise, achieving the ideal effect of high efficiency, fast consumption, and low energy consumption.
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. Can conduct digestion experiments on various substances such as COD, total phosphorus, and total nitrogen.
4、 Technical parameters:
1. Dissolve measurement range: CODcr：5-2500mg/L 、 Total phosphorus: 0.01-0.6mg/L, total nitrogen: 0.05-4mg/L
2. Anti chloride ion interference ability: ≤ 10000mg/L (based on COD)
3. Accuracy: CODcr： Indoor relative standard deviation ≤ 4.3%; Relative standard deviation between rooms ≤ 5.0% (80-150mg/L)
Total phosphorus and total nitrogen: both meet the national allowable error requirements
4. Accuracy: correlation coefficient r>0.999
5. Batch digestion sample quantity: 6 or 8 (optional)
6. Dissolving time: 5-15 minutes (depending on the number of samples and time)
7. Microwave operating frequency: 2450MHz, input power: 1.3kw, output power: 800w
8. Host size: 470mm×410mm×280mm
5、 Functional features:
1. Adopting a new digestion method greatly shortens the digestion time and complies with the national standard experimental method.
2. The entire digestion process does not require circulating water cooling, saving manpower and resources.
3. Just add an appropriate amount of mercuric sulfate masking agent to achieve the determination of high chlorine wastewater, killing two birds with one stone.
4. Can be used to determine COD values below 10mg/l.
5. Sealed digestion, overpressure protection, safe and reliable, with a buzzer indicating completion of digestion.
6、 Configuration List:
One digestion host, six or eight sealed digestion tanks, one power cord, and one certificate of conformity, warranty card, and instruction manual.