Method and system of atmospheric pressure megavolt electrostatic field ionization desorption (APME-FID)
Inventor: Dr Ng Kwan Ming
Atmospheric pressure megavolt electrostatic field ionization desorption (APME-FID) method generates ions directly from the surface of sample (2) connected to a high electrical voltage generator (1) at megavolt conditions. Megavolt electrostatic potential is generated and gradually accumulated directly on the sample (2) surface by a Van de Graaff generator without causing damage to the sample (2). Therefore, when coupled with mass spectrometric system, the APME-FID-MS method enables direct detection of analytes on the surface of samples in different sizes and diverse types.