Document Detail

Document authentication at molecular levels using desorption atmospheric pressure chemical ionization mass spectrometry imaging.
MedLine Citation:
PMID:  24078245     Owner:  NLM     Status:  In-Data-Review    
Molecular images of documents were obtained by sequentially scanning the surface of the document using desorption atmospheric pressure chemical ionization mass spectrometry (DAPCI-MS), which was operated in either a gasless, solvent-free or methanol vapor-assisted mode. The decay process of the ink used for handwriting was monitored by following the signal intensities recorded by DAPCI-MS. Handwritings made using four types of inks on four kinds of paper surfaces were tested. By studying the dynamic decay of the inks, DAPCI-MS imaging differentiated a 10-min old from two 4 h old samples. Non-destructive forensic analysis of forged signatures either handwritten or computer-assisted was achieved according to the difference of the contour in DAPCI images, which was attributed to the strength personalized by different writers. Distinction of the order of writing/stamping on documents and detection of illegal printings were accomplished with a spatial resolution of about 140 µm. A Matlab® written program was developed to facilitate the visualization of the similarity between signature images obtained by DAPCI-MS. The experimental results show that DAPCI-MS imaging provides rich information at the molecular level and thus can be used for the reliable document analysis in forensic applications. © 2013 The Authors. Journal of Mass Spectrometry published by John Wiley & Sons, Ltd.
Ming Li; Bin Jia; Liying Ding; Feng Hong; Yongzhong Ouyang; Rui Chen; Shumin Zhou; Huanwen Chen; Xiang Fang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of mass spectrometry : JMS     Volume:  48     ISSN:  1096-9888     ISO Abbreviation:  J Mass Spectrom     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-09-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9504818     Medline TA:  J Mass Spectrom     Country:  England    
Other Details:
Languages:  eng     Pagination:  1042-9     Citation Subset:  IM    
Copyright Information:
© 2013 The Authors. Journal of Mass Spectrometry published by John Wiley & Sons, Ltd.
National Institute of Metrology, Beijing, 100013, P. R. China.
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