Chemical Oxygen Demand
Water Quality Testing
WESHIN INSPECTION TECH CO., LTD_

Chemical Oxygen Demand (COD) Analysis

 

Rapid quantification of chemical oxygen demand for real-time wastewater monitoring and regulatory compliance.
 

Chemical Oxygen Demand (COD) measures the amount of oxygen required to chemically oxidize organic and inorganic matter in water. At Weshin Inspection Tech , we deliver high-accuracy COD testing in accordance with global standards (e.g., ISO 15705, EPA 410.4), providing the critical data needed for rapid environmental assessment and process control.

 

The Critical Importance of COD Testing

 

COD is the preferred indicator for fast-paced industrial water management:

  • Immediate Compliance Monitoring: Providing results within 2 hours to ensure industrial effluents remain within statutory discharge limits, avoiding the long wait times associated with BOD.

  • Process Efficiency Tracking: Monitoring COD reduction across treatment units (e.g., coagulation, biological filters) to optimize chemical dosing and operational costs.

  • Comprehensive Organic Load Assessment: Effectively quantifying refractory organic matter and toxic substances that may inhibit biological activity in traditional BOD tests.

  • Early Spill Detection: Serving as a rapid-response tool for identifying process upsets or unexpected organic spikes in manufacturing loops.
     

Our Analytical Capabilities

 

Weshin Inspection Tech utilizes standardized and optimized methodologies:

  • Closed Reflux Dichromate Method: Utilizing high-stability digestion tubes for enhanced safety and precise oxidation of complex organic matrices.

  • Spectrophotometric Detection: Advanced optical measurement of chromium reduction to ensure high throughput and exceptional data reproducibility.

  • Chloride Interference Mitigation: Specialized protocols for high-salinity samples (e.g., brines, textile wastewater) using masking agents to eliminate false-positive errors from chloride ions.
     

Why Partner with Weshin Inspection Tech?

 

  • Dynamic Concentration Ranges: Capable of analyzing diverse samples from low-range (3–150 mg/L) to ultra-high-range (up to 15,000 mg/L or higher with dilution).

  • Robust Quality Control: Every analytical batch is validated with KHP standards, blanks, and duplicates to ensure traceable and defensible data.

  • Holistic Water Profiling: Integrated reporting with BOD, TOC, TSS, and Nitrogen parameters to provide a complete picture of your wastewater's organic and chemical profile.


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