HC211 Coulometric Titration COD Analyzer Introduction: The sample is heated to induce the oxidation-reduction reaction between the organic matter in the water sample and the known amount of potassium permanganate added in advance. The HC211 coulometric COD analyzer measures the amount of residual potassium permanganate by coulometric titration. When starting to measure the heated sample, the Fe+3 ions in the reagent are reduced to Fe+2 ions by electrolysis. Fe+2 ions quickly consume excess potassium permanganate. When the excess potassium permanganate is completely consumed, the Fe+2 ion in the solution increases rapidly and is detected by the electrode, and the titration reaches the end point. Measure the amount of excess potassium permanganate by measuring the amount of electricity consumed until the end of the titration (current × time), and after calculation, the COD value is displayed in mg/L. Product Usage: It is widely used in the determination of chemical oxygen demand in different fields such as surface water, groundwater, tap water and drinking water. Features: 1. Visualization of the reaction process: the measurement process is clear, the end point is intuitive, and many parameters such as timing, potential, blank, and time signal diagrams can be clearly seen during the measurement process; 2. Reminder function: oxidative decomposition process, stable potential and buzzer reminder function when the end point is reached; 3. Data storage and output: automatic data storage, built-in printer, can print data from time to time, convenient and fast; 4. Coulometric titration: the end point depends on electrode detection, and is not affected by sample color and particulate matter; 5. The operation is simple and time-saving: the digestion only takes 5 minutes, and the titration is fully automatic; 6. Convenient instrument assembly: modular design, safe, simple, convenient and reliable disassembly and assembly; 7. Low testing cost: The matching A and B reagents can be directly used for the digestion test, which reduces the workload of the operator; the amount of reagents is small, which saves the testing cost; Technical Parameters: Measurement method: acid potassium permanganate coulometric titration Measuring range: 0.5-40 mg/L Measurement gear: 0.5-10mg/L, 7.5-20mg/L, 15-40mg/L Accuracy: ≤7.5mg/L ±0.5 mg/L; >7.5mg/L ≤10% Repeatability: 0.5-7.5mg/L≤4%; 7.5-25mg/L≤10% Measurement accuracy: 0.1 mg/L Measuring time: ≤5 minutes Output device: LCD screen, built-in printer Detection limit: 1mg/L Minimum reading: 0.001mg/L Power source: AC220V Work rate: ≤45W Weight: ≤3Kg
Introduction: The sample is heated to induce the oxidation-reduction reaction between the organic matter in the water sample and the known amount of potassium permanganate added in advance. The HC211 coulometric COD analyzer measures the amount of residual potassium permanganate by coulometric titration. When starting to measure the heated sample, the Fe+3 ions in the reagent are reduced to Fe+2 ions by electrolysis. Fe+2 ions quickly consume excess potassium permanganate. When the excess potassium permanganate is completely consumed, the Fe+2 ion in the solution increases rapidly and is detected by the electrode, and the titration reaches the end point. Measure the amount of excess potassium permanganate by measuring the amount of electricity consumed until the end of the titration (current × time), and after calculation, the COD value is displayed in mg/L. Product Usage: It is widely used in the determination of chemical oxygen demand in different fields such as surface water, groundwater, tap water and drinking water.
