Organic flowmeter

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What is the measurement process for TOC-8000? The measurement process of TOC-8000 total organic carbon online analyzer is as follows: inorganic carbon removal and organic carbon oxidation prepare carrier gas I. After passing through the pressure regulator, it is mixed with reagents (including phosphoric acid and sodium persulfate) from the injection pump and water sample (controlled by the distribution valve flow rate), and enters the agitation loop for acidification reaction. Inorganic carbon (such as carbonates and bicarbonates) in water samples is converted into carbon dioxide gas under the action of phosphoric acid, which is released through a gas/liquid separator to ensure that only organic carbon is measured in the future. The organic carbon in the water sample and the sodium persulfate in the reagent enter the reactor and undergo oxidation reaction under ultraviolet light, converting into carbon dioxide gas. Image: TOC-8000 Total Organic Carbon Online Analyzer CO2 Gas Transmission and Purification Load Distribution Stream Gas II enters the reactor through a flow meter, driving the generated CO2 gas into the condenser. After initial cooling, it enters the electronic cooler for further cooling to 6 ℃, achieving gas/water separation and eliminating water interference. Carbon dioxide gas is filtered through a filter cartridge to remove solid particles and interfering ions (such as acidic gases and particulate matter), ensuring gas purity. The purified carbon dioxide gas after concentration measurement and signal processing enters a non dispersive infrared detector (NDIR), and its concentration is measured through the principle of infrared absorption. The analog signal corresponding to the concentration of carbon dioxide output by the marketing NDIR is collected by the CPU after AD conversion, and the total organic carbon (TOC) value of the water sample is calculated through integration processing and linear fitting. Detailed explanation of key steps for inorganic carbon removal: After mixing the sample and reagent, inorganic carbon reacts with phosphoric acid to generate carbon dioxide, which is then released from the gas-liquid separator by the carrier gas to avoid interference with organic carbon measurement. Organic matter oxidation: The sample undergoes a combined action of ultraviolet light and sodium persulfate in the reactor, completely oxidizing organic carbon to carbon dioxide to ensure measurement accuracy. Data processing: The instrument adopts a combination of continuous and intermittent injection, and improves accuracy through long-term integration processing and linear fitting. The range covers 0-5000mg/L and is suitable for different water quality requirements of Jinyan. Process advantage: High sensitivity: Combined with wet oxidation and micro capacitive infrared detection method, it can detect TOC concentrations as low as 0-50mg/L. Strong anti-interference: By using gas/liquid separation, electronic refrigeration, and filter cartridge filtration, the influence of moisture and impurities on measurement is eliminated. Wide applicability: flexible range (0-50mg/L or 0-5000mg/L), meeting the needs of surface water, process water and other scenarios.

2. Overview of MOCVD

MOCVD (Metal Organic Chemical Vapor Deposition) is a technique used for growing compound semiconductor materials.

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