Online Total Phosphorus Analyzer (TP)
Typical Applications
The TP-2000B Online Water Total Phosphorus Analyzer is developed based on the latest 2022 environmental certification and testing standards. It enables long-term, unattended automatic monitoring of total phosphorus content in various water bodies and is widely applicable in surface water monitoring, environmental protection monitoring, industrial process water monitoring, municipal wastewater monitoring, wastewater treatment plant monitoring, and other related fields.
Product Features
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◎ Advanced Sequential Injection Platform: Significantly reduces the number of components, featuring a simple structure that is easy to troubleshoot.
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◎ High-Precision Stepping Syringe Pump: Employs a non-contact liquid dispensing design. Requires less dilution water for high-range measurements and features short dilution times.
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◎ 10-Port Valve Flow Path: Utilizes laser etching technology for precise customization of groove dimensions and positioning. The valve core is made of sapphire material, offering superior corrosion and wear resistance, long service life, and excellent stability.
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◎ Integrated Quartz Cuvette / Colorimetric Unit: Resistant to contamination with high absorbance resolution.
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◎ Imported Light Source: Requires no warm-up time and has a service life of up to 100,000 hours.
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◎ Innovative Flow Path and Measurement Environment: Effectively eliminates turbidity interference, ensuring reliable and accurate monitoring results.
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◎ Liquid Reagents: Do not require low-temperature storage and can be preserved at room temperature for over 30 days.
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◎ Power Failure Protection Design: Prevents data loss and automatically resumes operation upon power restoration.
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◎ Reduced Reagent and Waste Liquid Consumption: Lowers comprehensive operational and maintenance costs.
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◎ Intelligent Fault Alarm & Auto-Reset Function: Prevents abnormal instrument idling.
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◎ Automatic Verification & Judgment Function: Complies with the requirements of HJ 355-2019 “Technical Specification for Operation of Water Pollution Source Online Monitoring Systems (CODcr, NH₃-N, etc.)”.
Working Principle
The instrument’s measurement principle conforms to the standard GB 11893-89 “Water Quality – Determination of Total Phosphorus – Ammonium Molybdate Spectrophotometric Method”. For total phosphorus analysis, the sample is first thoroughly mixed with potassium persulfate and subjected to sealed, high-temperature, high-pressure digestion. This process oxidizes all forms of phosphorus present in the sample into orthophosphate. In an acidic medium, the orthophosphate reacts with ammonium molybdate and potassium antimonyl tartrate to form a phosphomolybdate heteropoly acid. This compound is then reduced by the reducing agent, ascorbic acid, to form a blue complex. The phosphorus content in the sample is determined by photometrically measuring the absorbance of this reaction product.
Technical Specifications
| Specification | Technical Parameter |
|---|---|
| Range | 0~2/10/20/50/100 mg/L, Auto/Manual range switching. Other ranges can be customized. |
| Indication Error | ±3% |
| Repeatability | ≤2% |
| Quantitation Limit | ≤0.02 mg/L |
| Resolution | 0.001 mg/L |
| 24h Low Concentration Drift | ≤0.01 mg/L |
| 24h High Concentration Drift | ≤1% |
Why Choose Dongrun Online Analyzers?
1μL High-precision Injection System Exclusive Patented Design.
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Accuracy
Replaces traditional peristaltic pumps with a more accurate injection pump, achieving precision to 1μL.
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Durable
The main components such as pumps and valves require no maintenance within one year.
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Cost-saving
Eliminates the need for pump tubing, saving on consumable replacements.
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Safety
Automatic activation of protective functions if the water tank is found to be empty, preventing pump damage.
Core Component Colorimetric Module Independently Developed and Manufactured
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The colorimetric module features reference light measurement functionality
It can mitigate interference from fluctuations in light sources or temperature changes on measurement results.
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50% increase in light source lifespan
Automatically controls light-on time to extends the lifespan of the light source, reducing aging.
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The program automatically adjusts the intensity of the light source
No manual intervention or maintenance required.
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The colorimetric module’s heating function is safe and reliable
Real-time monitoring of temperature rise rate, over-temperature alarm, and a fully enclosed design.
Advanced Quality Control Calibration System
| option | Regular brands | Dongrun | Value |
|---|---|---|---|
| Failure verification calibration | Manual adjustment in case of verification failure | Instrument automatically initiates recalibration in case of verification failure | More convenient |
| Selectable range | Only fixed range | High, medium, and low multiple ranges are available | Applicable range is more extensive |
| Verification method | Only range verification | Automatic zero-check and range verification, two methods | More accurate |
Low-Medium-High 3-in-1 Range System
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Three ranges
Instrument offers high, medium, and low three ranges.
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Customizable range values
Users can define range values for both the medium and high ranges. instrument will automatically adjust to match.
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Effortless operation
After switching between manual and automatic modes, there’s no need to recalibrate the instrument.
After changing the range, only single-point calibration is required, with no need for calibration of the working curve.
One-click waste discharge and one-click reagent filling.
Key operations are visualized, allowing real-time signal monitoring.
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Two modes of manual and automatic
In manual mode, users can select a specific range for measurement.
In automatic mode, the instrument will automatically switch ranges based on the measurement results.
