Total Organic Carbon Analyzer (TOC analyzer) is an instrument used to determine the total organic carbon (TOC) content in a solution. The carbon content represents the total amount of organic matter in the water body and is an important reference indicator for evaluating the degree of organic pollution in water bodies.
The core principle of the total organic carbon analyzer is to oxidize the organic carbon in the water sample into carbon dioxide, and determine the total organic carbon content in the water sample by detecting the concentration of carbon dioxide. Common oxidation methods include:
Combustion oxidation method: Inject water sample into a quartz tube in a high-temperature furnace, and at a high temperature of 900-950 ℃, use platinum and cobalt trioxide or chromium trioxide as catalysts to burn and decompose organic matter into carbon dioxide.
Photooxidation method: Using ultraviolet light (185nm) for irradiation, remove inorganic carbon and measure the concentration of TOC.
Wet oxidation: Before oxidation, the sample to be tested is treated with phosphoric acid to remove inorganic carbon, and then the concentration of TOC is measured.
Photochemical method: Combining ultraviolet light and chemical oxidants to achieve the oxidation of organic carbon.
structural composition
Sample processing module: including sampler (manual/automatic), sample pretreatment unit (such as acidification to remove IC, filtering out impurities), to ensure that the sample meets the detection requirements.
Oxidation module: High temperature combustion furnace (combustion method) or ultraviolet oxidation reaction tank (wet oxidation method), is the core unit for converting organic carbon into CO ₂.
Detection module: Non dispersive infrared detector (NDIR), some models are equipped with conductivity detectors or mass spectrometry detectors to enhance detection sensitivity.
Control and Data Module: Touch screen controller, supports parameter settings, automatic calibration, data storage and export, and can be integrated with laboratory LIS systems.
feature
Accurate and effective detection: Oxidation technology can quickly convert organic carbon, avoiding errors caused by residues, and is suitable for batch sample detection.
Easy to operate: With a high degree of automation, the entire process of injection, oxidation, detection, and data processing is automatically completed, reducing manual intervention.
Strong anti-interference ability: The preprocessing unit can effectively remove interference such as inorganic carbon and suspended solids, making it suitable for detecting complex matrix samples.
Environmental safety: The testing process is conducted in a closed manner, and CO ₂ is discharged after treatment without secondary pollution. Some models adopt mercury free design, which meets environmental standards.