质谱仪又称质谱计(Mass spectrometer),是一种进行质谱分析的仪器,即根据带电粒子在电磁场中能够偏转的原理,按物质原子、分子或分子碎片的质量差异进行分离和检测物质组成的一类仪器。质谱仪以离子源、质量分析器和离子检测器为核心。离子源是使试样分子在高真空条件下离子化的装置。 Mass spectrometer, also known as the mass spectrometer (mass spectrometer), is a mass spectrometry instrument that is based on the principle of charged particles can be deflected in the electromagnetic field, according to the quality of the material atoms, molecules or molecular fragments of the separation and detection of substance composition A class of instruments. Mass spectrometers are based on ion sources, mass analyzers and ion detectors. An ion source is a device that ionizes sample molecules under high vacuum conditions.