Differentiation of blue ballpoint pen inks by positive and negative mode LDI-MS
نویسندگان
چکیده
منابع مشابه
Forensic discrimination of blue ballpoint pen inks based on thin layer chromatography and image analysis.
This article aims to provide a new and fast method for differentiation of inks on a questioned document. The data acquisition was carried out by designing specific image analysis software for evaluating thin layer chromatograms (TLC-IA). The ink spot was extracted from the document using methanol and separated by TLC using plastic sheet silica gel 60 without fluorescent indicator, and a mixture...
متن کاملCharacterization of ballpoint pen inks by thermal and desorption and gas chromatography-mass spectrometry.
The characterization of ink on paper is of importance for dating and comparing questioned ink entries in forensic document examination. Inks are commonly characterized by their colorant profile that is identified by well-established analytical methods. Numerous ink formulations show identical colorant profiles, though. In order to differentiate inks that are not distinguishable by colorant anal...
متن کاملDating of ballpoint pen ink.
In this paper we describe a case in which a cash book, dated of the year 2000, was sent to the Forensic Science Division, Document Laboratory, Zurich Canton Police in March 2003. The questioned document was a list of 29 pages containing a consecutive handwritten numbering and dated entries (payments) made of blue ballpoint pen ink. By definition, a cash book has to be written by hand and the en...
متن کاملForensic analysis of ballpoint pen inks using paper spray mass spectrometry.
A novel analytical approach based on paper spray mass spectrometry (PS-MS) is developed for a fast and effective forensic analysis of inks in documents. Ink writings made in ordinary paper with blue ballpoint pens were directly analyzed under ambient conditions without any prior sample preparation. Firstly, the method was explored on a set of distinct pens and the results obtained in the positi...
متن کاملPositive and negative ion mode ESI-MS and MS/MS for studying drug-DNA complexes
We report systematic investigation of duplex DNA complexes with minor groove binders (Hoechst 33258, Hoechst 33342, Netropsin and DAPI) and intercalators (daunomycin, doxorubicin, actinomycin D, ethidium, cryptolepine, neocryptolepine, m-Amsacrine, proflavine, ellipticine and mitoxantrone) by ESI-MS and ESI-MS/MS in the negative ion mode and in the positive ion mode. The apparent solution phase...
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ژورنال
عنوان ژورنال: Forensic Science International
سال: 2011
ISSN: 0379-0738
DOI: 10.1016/j.forsciint.2010.05.027