The mixture of water sample, catalyst solution, and strong oxidant digestion solution is heated to 120 ℃. Polyphosphate and other phosphorus containing compounds in the water sample are digested and oxidized by the strong oxidant under acidic conditions of high temperature and high pressure to generate phosphate ions. In the presence of the catalyst, phosphate ions form a colored complex in a strong acid solution containing molybdate. The analyzer detects the color change and converts it into total phosphorus value output. The amount of colored complex generated is equivalent to the total phosphorus content.
1. The digestion colorimetric process of the instrument is completed in one, with a simple and reliable structure, reducing the possibility of errors.
2. Adopting imported modified polytetrafluoroethylene transparent hose with a diameter greater than 1.5mm, reducing the probability of particle blockage in water samples.
3. It can automatically clean the sampling pipeline to prevent the formation of algae or biofilm.
4. After abnormal reset and power failure, the instrument will automatically discharge residual reactants and restore working status.
5. Low failure rate, minimal maintenance, and low reagent consumption.
6. The intelligent fault self diagnosis function, alarm prompt, instrument management and maintenance are very convenient.
7. Adopting multi-channel valves, it has strong anti-corrosion performance, long service life, and is safe and reliable.
model | YK-ZLG-3020 |
Method basis | HJ 593-2010 "Water Quality - Determination of Elemental Phosphorus - Phosphomolybdenum Blue spectrophotometric method" |
measuring range | 0~300mg/L total phosphorus |
Accuracy | Indication error ≤± 10% |
Repetitive error | ≤±10% |
Measurement cycle | The minimum measurement cycle is 40 minutes, and the digestion time can be arbitrarily modified within 5-20 minutes according to the actual water sample. |
sampling period | Time interval (adjustable from 20 to 9999min) and hourly measurement mode |
correcting | The instrument can perform sensitivity and zero calibration at regular intervals |
Calibration cycle | Adjustable at any interval and time from 1 to 99 days |
Maintenance cycle | Usually once a month, about 30 minutes each time |
Analog output | 1-channel 4-20mA output (optional 2-channel 4-20mA output) |
Signal interface | RS232 or RS485 |
Switching quantity | Optional 1-6 relay outputs, capacity 220VAC/2A |
Environmental requirements | Suggested temperature+5-28 ℃; Humidity ≤ 90% (non condensing) |
Comparison of actual water samples | Error ≤± 10% |
MTBF | ≥ 720h/time |
Size | Height 1430 x width 500 x depth 403 (mm). |
Power Supply | AC220±10%V，50±10%Hz，5A |
other | Abnormal alarms and power outages will not result in data loss; Touch screen display and command input; |
application area | Suitable for wastewater with total phosphorus in the range of 0-50mg/L. Most common ions do not interfere with the measurement, but For some samples containing a large amount of organic matter, the measurement results may be underestimated. Laboratory and on-site fast Rapid water quality analysis, online monitoring of river, lake, reservoir, and groundwater quality, and online monitoring of water quality in water treatment plants Monitoring, online monitoring of industrial pollution source wastewater, online monitoring of inlet and outlet water quality of municipal sewage treatment plants, etc |
