Detection apparatus and detection method

A detection apparatus comprising:

• a sampling device for collecting a sample to be detected;
• a sample pre-processing device configured to pre-process the sample from the sampling device;
• and
• a sample analyzing device for separating the sample pre-processed by the sample pre-processing device and analyzing the separated sample;
• wherein the sample pre-processing device comprises:
• a gas suction pump, absorbers, a piston cylinder block and a desorption cylinder block, the desorption cylinder block having a desorption chamber, the desorption cylinder block being provided with a carrier gas inlet and a carrier gas sweeping/shunting outlet that are in communication with the desorption chamber and an interface which is connected to an analytical instrument, and an outer wall of the desorption cylinder block being provided with a heating film and a temperature sensor;
• the piston cylinder block is provided with two piston chambers, each of which is mounted with one of the absorbers;
• the piston cylinder block is mounted on the desorption cylinder block, and the two piston chambers are in communication with the desorption chamber;
• the piston cylinder block is provided with a sample gas inlet port and a gas suction pump port, and, the sample gas inlet port is connected to the sampling device while the gas suction pump port is connected to the gas suction pump;
• the absorber comprises an adsorption riddle drum for storage of adsorbents and a piston rod connected with each other, wherein the piston rod is slidably mounted within the piston chamber and drives the adsorption riddle drum to slide along the piston chamber and is configured to reach into the desorption chamber, and wherein the adsorption riddle drum is configured to be in communication with the sample gas inlet port and the gas suction pump port simultaneously.