Total Phosphorus Analyzer

1.Total Phosphorus Analyzer Principle

Under high temperature and high pressure conditions, the sample is digested with potassium persulfate, and all phosphorus compounds in the sample are converted to orthophosphate (this step is not required for measuring orthophosphate). In a 5%-8% nitric acid solution, orthophosphate forms a soluble phosphorus-vanadium-molybdenum yellow complex with ammonium metavanadate and ammonium molybdate, and its absorbance is measured at a specific wavelength. The absorbance is linearly related to the orthophosphate concentration of the sample. Based on this relationship, the absorbance can be converted into the total phosphorus (TP) or orthophosphate (PO4) concentration value of the sample.

2. Product Features of Total Phosphorus Analyzer

The new photoelectric quantitative technology is not affected by interference such as large chromaticity, large amounts of suspended matter, and large amounts of bubbles. It has high reliability and accuracy and strong anti-interference ability.

High detection accuracy, low measurement limit and small long-term drift of the instrument.

It has one-button self-test function and self-diagnosis function.

Adopt single-channel highly integrated valve group, maintenance and cleaning are simple and quick.

All-weather networking function, monitor the instrument operation status anytime and anywhere.

It has alarm function, quality control function and reverse control function.

It has automatic cleaning and automatic calibration functions.

It has functions of hourly measurement, interval measurement and external control measurement.

It will work automatically after power failure.

Automatic prompt and automatic reset function for fault and reagent (sample) shortage.

With fault recording function.

Can save historical data for more than 3 years.

Meet the requirement of separate discharge of cleaning liquid and waste liquid

3. Total Phosphorus Analyzer Technical Parameters

Measurement method: Ammonium molybdate spectrophotometry (HJ670-2013)

Measuring range: 0-2 mg/L; 0-10 mg/L; 0-50 mg/L; range can be customized

Indication error: ≤±3% Detection limit: 0.010mg/L

Repeatability: ≤±3% Waste volume: 4.5mL/time

Memory effect: ≤±1% Actual water sample comparison: ±8%

Constant temperature time: 900 seconds Voltage stability: ≤±5%

Measurement cycle: 39 minutes Calibration cycle: any specified time

Maintenance cycle: ≥720h/time Maintenance workload: <2 hours/month

Reagent consumption: 3 months/500ml Display output: Equipped with 10.1-inch color LCD touch screen

Color development temperature: recommended temperature is 120℃, can be set according to the actual water sample conditions

Data export: The measured values can be imported into a USB flash drive and saved via the USB port

Signal output: RS485/RS232/USB interface/standard 2-way 4-20mA output/standard 2-way switch input and output

Environmental requirements: Temperature-controlled indoor environment, recommended temperature (5-28°C), humidity ≤ 90% (no condensation)

Power supply and power: (220V±22)V/AC, (50±0.5Hz), 5A, 150W

Instrument size: upper cabinet 600*450*300mm; upper cabinet 700*450*300mm