کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
96254 160460 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Statistical discrimination of black gel pen inks analysed by laser desorption/ionization mass spectrometry
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Statistical discrimination of black gel pen inks analysed by laser desorption/ionization mass spectrometry
چکیده انگلیسی

Pearson correlation coefficients were applied for the objective comparison of 30 black gel pen inks analysed by laser desorption ionization mass spectrometry (LDI-MS). The mass spectra were obtained for ink lines directly on paper using positive and negative ion modes at several laser intensities. This methodology has the advantage of taking into account the reproducibility of the results as well as the variability between spectra of different pens. A differentiation threshold could thus be selected in order to avoid the risk of false differentiation. Combining results from positive and negative mode yielded a discriminating power up to 85%, which was better than the one obtained previously with other optical comparison methodologies. The technique also allowed discriminating between pens from the same brand.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forensic Science International - Volume 217, Issues 1–3, 10 April 2012, Pages 127–133
نویسندگان
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