Ion trap mass analyzer based infrared light dissociation spectrograph

The invention discloses an ion trap mass analyzer based infrared light dissociation spectrograph. The infrared light dissociation spectrograph comprises an electric spraying apparatus, a transmission line, an octopole rod, a hexapole rod and a low-temperature linetype ion trap which are connected in sequence, wherein an ion detector and an infrared laser system are arranged outside the low-temperature linetype ion trap; the transmission line, the octopole rod, the hexapole rod and the low-temperature linetype ion trap are arranged in a four-level differential air-extraction vacuum system; the electric spraying apparatus is taken as the ionization source for ionizing neutral substances into ions; then the ions are transferred to the low-temperature linetype ion trap through the transmission line, the octopole rod and the hexapole rod; the low-temperature linetype ion trap is used as the mass analyzing device; the infrared light output by the infrared laser system is emitted to the low-temperature linetype ion trap; and the ions are subjected to the links of ionization, ion cooling, ion selection, infrared light dissociation, mass analysis and clearing in the low-temperature linetype ion trap. The ion trap mass analyzer based infrared light dissociation spectrograph has the characteristics of miniaturization, low cost, easy maintenance, high stability, high sensitivity and high resolution.