A rapid method for detection of gunshot residue using microwave plasma torch-mass spectrometry

A microwave plasma torch-mass spectrometer (MPT-MS) method was developed to detect simultaneously three heavy metal components (lead, barium, antimony) of gunshot residues. The MPT technique was demonstrated and the method using MPT as ionization source of mass spectrometer was introduced. As expected, MPT-MS exhibits highly sensitivity and specificity for detection of elements. This study indicates that MPT-MS offers substantial potential for forensic gunshot residue examinations.