The organic carbon element carbon analyzer is an analytical instrument that applies the principle of thermal optical measurement and is suitable forNIOSH、the United StatesIMPROVE_A Law, CanadaMSC1, and Hong Kong, ChinaEPD-TOT By using various methods, users can choose the appropriate analysis program in the software, or modify the parameters in the heating program to achieve the desired experimental temperature, and then measure the organic carbon in the particulate matter sample（OC）And elemental carbon（EC）Content can also be directly measured for carbonates in atmospheric particulate matter samples（CC）Content.

Heating a filter membrane carrying particulate matter in a pure helium environment to remove organic carbon from the membrane（OC1TheOC2TheOC3TheOC4） convert to CO2Then, in the presence of O2 of HeContinue heating in the environment, and at this time, the elemental carbon in the filter membrane（EC1TheEC2TheEC3）Oxidized to CO2.CO2 It needs to be further reduced to methane through a methane converter CH4Finally, using a hydrogen ion flame detector（FID）Detected; Using laser irradiation on quartz filter membrane and measuring the reflection or transmission signal of the filter membrane through photodetector,By indicating the starting point of elemental carbon oxidation through signal changes, optical cracking carbon is formed during the carbonization process of organic carbon（OPC）During the heating process of thermal optical analysis methodOCGradually transform intoOPC, causing a decrease in laser signal, followed byO2ofHeIn the environment,ECGradually oxidized intoCO2The laser signal returns to its initial value, which is defined asOCandECThe segmentationPoint.