Direct sample analysis-mass spectrometry vs separation mass spectrometry techniques for the analysis of writing inks
| Autor: | Mehdi Moini, Lucy Nguyen |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Desorption electrospray ionization
Dart Chromatography Chemistry 010401 analytical chemistry Analytical chemistry Atmospheric-pressure chemical ionization Mass spectrometry 01 natural sciences DART ion source 0104 chemical sciences Pathology and Forensic Medicine Analytical Chemistry 03 medical and health sciences 0302 clinical medicine Ionization Materials Chemistry 030216 legal & forensic medicine Physical and Theoretical Chemistry Gas chromatography–mass spectrometry Time-of-flight mass spectrometry Law computer Spectroscopy computer.programming_language |
| Zdroj: | Forensic Chemistry. 1:78-85 |
| ISSN: | 2468-1709 |
| DOI: | 10.1016/j.forc.2016.07.007 |
| Popis: | Direct sample analysis (DSA) coupled with high resolution, high mass accuracy time of flight mass spectrometry (TOF-MS) is an emerging technique for the in situ analysis of various substances. DSA is similar to desorption electrospray ionization (DESI) and direct analysis in real time (DART), however, it uses an atmospheric pressure chemical ionization source for ionization of organic compounds. In this study, DSA was applied to the identification of 80 black and blue writing inks from both ballpoint and non-ballpoint pens. Approximately 3 mm sections of each writing was placed on the DSA sample holder and analyzed in an automated fashion. The holder can analyze 13 samples in a serial manner. Utilizing a high mass accuracy TOF-MS and using internal calibration, mass accuracy of |
| Databáze: | OpenAIRE |
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