The quadrupole mass spectrometer array (QMSA) is the most important embranchment in the miniaturization of the quadrupole mass spectrometer (QMS). Making miniature mass filter is one of the key technology in the manufacture of QMSA. In this paper, the method of LIGA technology and its application in making mass spectrometer are introduced. This resolve radically the question how to making a miniature QMS in volume, weight, power and cost.
The mass spectrometer and the method of measuring concentration of oxygen in the region of mouth and nose in vivo experiment under low pressure were developed. A mass flow controller was assembled through the inlet capillary of MGA-1100 mass spectrometer. The mass flow controller was controlled by a computer controlled the operating pressure in MGA -1100 to make operating in its linear region. The measuring value is not affected from the pressure of inlet. MGA-1100 mass spectrometer with improved inlet system can reach the demand of most human experiment under low pressure.
