| 摘要 |
Disclosed is the use of matrix assisted mass spectrometry to determine the presence of a residue within a fingerprint. Specifically disclosed is a method for determining the presence of a residue within a fingerprint, using a matrix assisted mass spectrometry technique wherein the method comprises i) applying to the fingerprint particulate matter which (1) is capable of acting as a matrix in a matrix-assisted mass spectrometry technique; and (2) aids detection and/or imaging of a fingerprint, to form a particle-applied fingerprint; and; ii) subjecting the material forming the particulate-applied fingerprint to the matrix-assisted mass spectrometry technique so as to detect the presence or absence of the residue, wherein the matrix assisted mass spectrometry technique is selected from MALDI-TOF-MS and SALDI-TOF-MS, and further wherein the particulate matter comprises hydrophobic silica particles and a metal, metal nitride, metal oxide or carbon.
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