Study on the Chemical Oxygen Demand of Water Determined by Environment Emergency Monitoring Method
With the rapid social and economic development, the environmental pollution accidents especially the emergent water pollution accidents have occurred more frequently and showed the tendency of being more dangerous. Emergency monitoring technology is the important link in disposition and aftercare of water pollution accident. Vacuum testing tubeelectric colorimeter method determination of chemical oxygen demand was studied. The experiment results showed that the accuracy and precision were higher. The detective limitation was 10 mg/L,the recovery was 89.0% ~ 105%,the relative standard deviation was 1.8% ~ 12.3%,the relative error was-2.38% ~ +8.80%.When testing various actual samples by the two methods,the relative error was-34.7% ~ +6.86%,It was concluded that detection tube method could meet the needs of Semi-quantitative test, both meet the requirements for environmental emergency monitoring and analysis.