Gas chromatography mass spectrometry (GC-MS) is an analytical method that combines the advantages of gas chromatography and mass spectrometry. By combining these two techniques, identification of different substances within a test sample can be achieved. The fields of application for the GC-MS is wide-ranging and can include drug detection, airport security, environmental analysis and to identify unknown samples.
- Different vacuum pressures in different stages
- High reliability
- Low power consumption
How does it work?
A GC-MS is a combination between a gas chromatograph (GC) and a mass spectrometer (MS). The gas chromatograph is used to unstitch the researching mixture and the mass spectrometer to identify the individual components. The tie bar of a gas chromatograph is made of a thin tube or capillary as a stationary phase and an inert gas will flow through as a mobile phase. In this gas flow the aerially and composed out of neutral molecules mixture will be inject. Every component of the mixture has a specific speed to pass through the thin tube, so the mixture will unstitch with this effect. The gas mixture will lead to the ionization source and will be ionized there and then go through the mass filter.
Due to the different vacuum pressures that are needed in the various mass spectrometry stages, the turbopump is the core of the vacuum system. Therefore, Pfeiffer Vacuum manufactures a customized SplitFlow turbopump to evacuate different vacuum stages with only one pump. To reach the essential pressure range, a backing pump is also necessary. There are various options possible such as dry backing pumps, like diaphragm pumps, or Roots pumps as well as rotary vane pumps. To realize your working pressure, Pfeiffer Vacuum offers a wide range of gauges. With the RS-485 interface, most of the products from Pfeiffer Vacuum can communicate with each other, resulting in one controller for your entire vacuum system.