Fingerprint analysis using mass spectrometry

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/117 (2006.01) G01N 27/64 (2006.01) G01N 33/483 (2006.01) G01N 33/487 (2006.01) H01J 49/04 (2006.01)

Patent

CA 2617513

The application relates to a method for determining the presence of a residue on or within a fingerprint using mass spectrometric techniques. The mass spectrometric technique may be selected from MALDI-TOF-MS and SALDI-TOF-MS . A particulate suspension which acts as a matrix in matrix assisted laser desorption, and aids visualisation of the fingerprint, is applied to the fingerprint . Examples of suitable matrices are hydrophobic silica, titania, carbon black, fullerene, carbon nanotubes etc. Optionally, the fingerprint can be lifted using lifting tape.

L'invention concerne un procédé pour déterminer la présence d'un résidu sur ou dans une empreinte digitale par des techniques de spectrométrie de masse. La technique de spectrométrie de masse peut être sélectionnée parmi MALDI-TOF-MS et SALDI-TOF-MS. Une suspension particulaire, qui agit comme une matrice en désorption laser assistée par matrice et facilite la visualisation de l'empreinte digitale, est appliquée sur l'empreinte digitale. Parmi des exemples de matrices appropriées figurent la silice hydrophobe, le dioxyde de titane, le noir de carbone, le fullerène, les nanotubes de carbone etc. Eventuellement, l'empreinte digitale peut être relevée au moyen d'un film pour relevé d'empreintes.

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