The invention discloses a
spectroscopy-
mass spectrometry combined quantitative analysis device for elements in an unknown sample. The device uses a quantitative analysis structure and a method by using a
laser-induced breakdown
spectroscopy combining with a second level extraction field time-of-flight
mass spectrometry (TOF). The quantitative analysis device with high detection sensitivity, real time, quickness, high accuracy, no contact, capability of simultaneously detecting multiple elements, and no need of pretreating the sample is realized. Due to dual-
wavelength laser in the device, photofragments and molecular clusters are re-ionized conveniently, the
mass spectrometry
signal stability is improved, and a
laser plasma emission
spectroscopy signal is improved; due to a second level extraction field in the device, the TOF resolution ratio is improved conveniently and the
signal is optimized conveniently; due to a spectroscopy
collection system in the device, the capability of collecting
plasma emission light to couple to
optical fiber can be improved, an
optical path can be folded, the integration and the
miniaturization of an instrument are facilitated, and the commercialization of the instrument is realized conveniently.