Membrane introduction ion trap MS

In the membrane introduction ion trap MS (MIMS) technique, a membrane composed of a microporous polypropylene hollow support fiber coated with an ultrathin ca 0.5 p,m) polydimethylsiloxane layer serves as the interface between the sample and the vacuum chamber of the mass spectrometer. The simultaneous diffusion of volatile and semivolatUe compounds through the ultrathin polydimethylsiloxane MIMS membrane is one of the method s strengths, in that all the analytical information is obtained in a relatively short time (in the order of seconds to minutes). Lead and nickel / -diketonates could be detected by the MIMS technique. ... 

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