ASTM D5997 On-Line Carbon Monitoring in Water Testing
ASTM D5997 determines the Total Carbon (TC), Inorganic (IC), and Total Organic Carbon (TOC) in water by utilizing ultraviolet, persulfate oxidation of organic carbon together with a CO2 selective membrane to recover the CO2 into deionized water. The values are expressed in SI units as standard.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM D5997 covers the online monitoring of carbon content in water systems, typically measured as total organic carbon (TOC). The test evaluates the presence of organic contaminants in water through continuous or periodic monitoring.
This method is widely used in water treatment, pharmaceutical, and industrial processes. It helps ensure water quality, process control, and compliance with environmental and regulatory requirements.
Scope, Applications, and Benefits
Scope
ASTM D5997 evaluates carbon content in water using online analytical systems. The test provides real-time monitoring of organic contamination levels in various water streams.
The test evaluates:
- Total organic carbon (TOC) in water
- Presence of organic contaminants
- Water quality consistency
- Process control efficiency
- Suitability for industrial and regulatory applications
Applications
- Water treatment and purification systems
- Pharmaceutical and laboratory water
- Industrial process water monitoring
- Environmental water analysis
- Power plants and cooling systems
- Quality control in water systems
Benefits
- Provides real-time monitoring of water quality
- Detects contamination quickly
- Supports regulatory compliance
- Improves process control and efficiency
- Enables continuous data tracking
Test Process
Sample Collection
Sample Collection
1Oxidation Process
Organic carbon is oxidized to carbon dioxide.
2Detection
Detection
3Data Recording & Evaluation
CO₂ is measured using suitable detection methods.
4Data Recording & Evaluation
| Parameter | Details |
|---|---|
| Applicable Materials | Water and aqueous systems |
| Measurement Range | ~0.1 ppm to 1000 ppm TOC |
| Measurement Range | Detection Method |
| Response Time | ~1 minute to 10 minutes |
| Response Time | ±2% to ±5% |
| Measured Outputs | Total organic carbon (ppm) |
Instrumentation Used for Testing
- TOC analyzer (on-line system)
- Oxidation unit (UV/persulfate or combustion)
- CO₂ detector
- Sample delivery system
- Calibration standards
- Data acquisition system
Results and Deliverables
- Total organic carbon (TOC) values
- Real-time monitoring data
- Water quality assessment
- Contamination detection analysis
- Test condition summary
- ASTM compliance report
Frequently Asked Questions
ASTM D5997 covers on-line monitoring of carbon in water. It measures total organic carbon levels, helping assess water quality, contamination, and treatment efficiency in industrial and environmental applications.
Key parameters include sample flow rate, oxidation method, detector calibration, temperature, and instrument setup. Controlled conditions ensure accurate continuous monitoring of carbon levels in water systems.
The test measures total organic carbon concentration, typically expressed in mg/L. Results indicate presence of organic contaminants and effectiveness of water treatment processes.
ASTM D5997 applies to water samples in industrial processes, wastewater treatment, and environmental monitoring where continuous carbon measurement is required.
ASTM D5997 results depend on instrument calibration and maintenance. Interference from inorganic carbon or system fouling may affect accuracy, requiring proper validation and periodic verification procedures.
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