High chlorine and conventional dual-purpose graphite COD digestion instrument

High chlorine and conventional dual-purpose graphite COD digestion instrument

1According to the industry standardThe requirements of HJ/T70-2001 require nitrogen circulation throughout the digestion process, which meets the technical requirements;

2The high chlorine wastewater is cooled by tap water, while the conventional part is cooled by water+Air cooling.

2. Equipped with 6 flow meters, each sample can be individually controlled for nitrogen flow rate, saving nitrogen and improving experimental accuracy;

3. Using graphite plate heating, digestion experiments can be conducted simultaneously on 6 high chlorine samples, 12 conventional samples, or 6+6 combination samples;

4. Built in high-power fan, utilizing air and water cooling technology, combined with glass burr condensation reflux pipe cooling, effectively saves water and energy;

5. Using a specially designed triangular flask for digestion, the sample can be directly titrated after digestion, making it convenient for experimental personnel to operate. High chlorine and conventional dual-purpose graphite COD digestion instrument

High chlorine content:

1. Anti chlorine interference: 1000-20000mg/L (if higher, please follow HJ/T132-2003 experiment);

2. Detection limit: 30mg/L;

3. Nitrogen flow rate: 5-60mL/min;

4. Measurement range: ≤ 1000mg/L (greater than dilution);

5. Dissolving time: 2 hours (with a time adjustment amplitude of 10 minutes);

6. Dissolving volume: 250mL;

7. Measurement error: ≤ 500mg/L, relative standard deviation not exceeding 5.0%; ≤1000mg/L， The relative standard deviation is not greater than 8.0%;

8. Working environment: (5~40) ℃; Relative humidity<85% (no condensation);

9. Heating power: 3000W (220V, 50HZ).

General section:

1. Measurement range: 5-800mg/L, 800-1000mg/L (diluted)
2. Number of samples heated simultaneously: 8-10 to 12

3. Measurement time: no more than 2 hours
4. Measurement error: Potassium hydrogen phthalate standard solution (500mg/L), relative standard deviation not greater than 5.0%, industrial organic wastewater (500mg/L), relative standard deviation not greater than 8.0%
5. Environmental temperature: 0-45 ℃

6. Accuracy: COD is compared to classical reflux method, and the results are within the normal deviation range
7、 加热功率：3000W平均功率： 1600W

8. Temperature adjustable range: 32-400 ℃

9. Constant temperature accuracy: ± 2 ℃

10. Heating time: from room temperature to 180 ℃ ＜ 30 minutes

11. Using graphite material heating plate, the temperature is more uniform.