The 1000 ℃ catalytic combustion oxidation method involves introducing the sample and purified gas (high-purity oxygen) into a high-temperature combustion tube and a low-temperature reaction tube, respectively. The sample passing through the high-temperature combustion tube is subjected to high-temperature catalytic oxidation, where both organic and inorganic carbon are converted into carbon dioxide. After the sample passing through the low-temperature reaction tube is acidified, the inorganic carbon is decomposed into carbon dioxide. The carbon dioxide produced in the two reaction tubes is sequentially introduced into the non dispersive infrared gas detector NDIR through carrier gas transportation, CO2 has been detected. Thus, the total carbon (TC) and inorganic carbon (IC) in the water were measured separately. The difference between total carbon and inorganic carbon is called total organic carbon (TOC). Namely: TOC=TC- IC

1. Adopting an eight channel rotary valve to achieve acid solution, sample TC、IC、 Automatic implementation of blowing, waste removal, and cleaning, and quantitative injection of TC and IC. Multi directional cleaning and blowing of pipelines can clean internal circuits according to operational requirements, greatly reducing the incidence of failures and instrument maintenance time.
2. The combustion furnace heating adopts multiple protections, with an overheat protection circuit independent of the temperature control system. Overheating can automatically cut off the heating to ensure product safety.
3. The catalytic combustion oxidation method has strong oxidation ability and can almost oxidize all organic compounds with stable performance. The 1000 ℃ combustion method is almost below the melting point of all salts, with a maximum salt tolerance of 300g/L.
4. The instrument uses a high-resolution 7-inch touch screen, an intelligent system, and a fully Chinese interface, making the interface friendly and easy to operate.
5. Electronic dual refrigeration module and membrane dehydration technology ensure the dehydration efficiency of the entire system to protect the detector.
6. Configure a needle printer that can print and output according to requirements, and the printed results can be saved for a long time.
7. Real time traffic monitoring to maintain stable flow paths and ensure data reliability;
8. The instrument automatically discharges waste, acid and feed, and the acid feed rate is controlled stably;

Environmental temperature: (1-40) ℃
Relative humidity: （10-85）%
Power supply: (220 ± 10%) VAC 50/60Hz, reliable grounding required
Power: 1200W when the electric furnace is heated up
Acidizing agent: 10% phosphoric acid
Gas source: high-purity oxygen (≥ 99.999%, with preliminary pressure reducing valve)
Injection method: automatic injection
Combustion furnace temperature: (680-1000) ℃
Testing time: （2-4）min
Measurement range: (0-1000.0) mg/L (in non diluted state)
Repeatability: ≤ 3%
TC indication error: ± 0.1% F.S or ± 5% (whichever is greater)
IC indication error: ± 0.1% F.S or ± 4% (whichever is greater)
Linear: R2≥99.9%
Response time: （1-4）min

The determination of total organic carbon (TOC) in surface water, groundwater, domestic sewage, and industrial wastewater is applied in environmental monitoring, urban water supply and drainage, disease control, chemical and power industries.