How to use TOC water quality detector

How to use TOC water quality detector

this instrument consists of wet oxidation circuit and carbon dioxide gas detector. Simple structure, convenient connection, easy maintenance and upgrading; Low operating cost, suitable for teaching in factories and mining enterprises, grass-roots environmental protection monitoring departments and teachers and students in relevant colleges and universities; The wet oxidation/micro volume infrared detection method has high sensitivity and the measurement range is suitable for surface water and process water

1. After passing through the pressure regulator, the carrier gas I enters the agitation loop together with the reagent from the peristaltic pump and the water sample from the peristaltic pump and distribution valve, and fully maintains the integrity of parts and components for different materials; Acidification reaction. The inorganic carbon in the water sample is converted into carbon dioxide gas under the action of phosphoric acid and then escapes from the outlet of the gas/liquid separator. The organic carbon in the water sample and the sodium persulfate in the reagent enter the reactor. Under the action of ultraviolet light and sodium persulfate, organic carbon is converted into carbon dioxide gas

2. The carrier gas II enters the reactor through the flowmeter and drives the carbon dioxide gas into the condenser. The condensed carbon dioxide gas enters the electronic cooler for further cooling to 6 ℃, so as to achieve the purpose of gas/water separation and eliminate the influence of water on the measured value

3. Filter out the solid particles and interfering ions that may exist in the carbon dioxide gas and enter NDIR for concentration measurement

4. NDIR outputs an analog signal corresponding to the concentration of carbon dioxide gas; After AD conversion, this signal is collected and processed by CPU to display the total TOC value of water sample

5. Removal of inorganic carbon

carbonate, bicarbonate and dissolved carbon dioxide in the sample must be removed before the organic carbon test process in order to only consider "organic carbon". After the sample and reagent are mixed, the inorganic carbon reacts with phosphoric acid. Driven by the carrier gas, carbon dioxide escapes from the gas-liquid separator

6. Oxidation of organic matter

the sample is mixed with the reagent and flows into the reactor. Through the irradiation of ultraviolet light and the action of oxidant sodium persulfate (ammonium), the organic carbon in the sample reacts quickly to form carbon dioxide

7. Data processing

the continuous and intermittent instrument is the main way to improve and improve traditional materials at this stage. The combination of sample injection and TOC oxidation is sufficient, which increases the measurement range and improves the accuracy and stability of the instrument. The data processor collects the CO2 concentration for a certain period of time, and performs integral processing and linear fitting. Automakers are demanding ways to optimize electromechanical efficiency