| abstract |
The present invention relates to an on-line analyzer for VOCs in gas and method of using the same, comprising: a sampling device (1), an gas-supply device (2) and a refrigerating device (3) connected to the sampling device (1) and the gas-supply device (2) respectively; the on-line analyzer for VOCs in gas with two cryo-focuses in empty tubes and two detectors also comprises a gas flow control device (4) connected to the sampling device (1) and the gas-supply device (2) respectively, an analyzing device (5) connected to the gas flow control device (4), and a data acquisition and processing device connected to the analyzing device (5). Therefore, the present invention has a following advantage: the present invention runs automatically and continuously over a long period since it uses electronic refrigeration technique to achieve cryo-refrigeration, instead of using liquid nitrogen refrigeration technique which needs frequent addition of liquid nitrogen and limits application conditions. |