کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
106965 161732 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The potential for application of ink stable isotope analysis in questioned document examination
ترجمه فارسی عنوان
پتانسیل کاربرد تجزیه و تحلیل ایزوتوپ پایدار جوهر در معاینه اسناد مطرح شده
کلمات کلیدی
نسبت ایزوتوپ نیتروژن، نسبت ایزوتوپ کربن، نسبت ایزوتوپ هیدروژن، نسبت ایزوتوپ اکسیژن، علم قضایی، طیف سنجی جرم نسبت ایزوتوپ
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• We investigated application of stable isotope analysis to characterize pen ink.
• Inks were analyzed “as is” and following application to paper.
• There was isotope ratio variation among inks of different ages, types, and brands.
• Paper inked with different pens could be distinguished using stable isotope ratios.
• With reductions in sample size, technique could be useful in document examination.

We investigated a novel application of stable isotope abundance analysis of nitrogen (15N), carbon (13C), hydrogen (2H), and oxygen (18O) to characterize pen ink. We focused on both ballpoint and gel pen inks. We found that the isotope ratios of ink from pens purchased together in a package were similar and within-package stable isotope ratio variability was not significantly larger than the variability of isotope reference materials used during analysis. In contrast, the isotope ratios of ink from pens of the same brand purchased in three states of the continental USA were significantly different from each other and there was isotope ratio variation among pens of the same brand but different, unknown production periods. The stable isotope ratios of inked paper were statistically distinguishable using measured δ15N values. Paper inked with different gel pens was statistically distinguishable using measured δ2H values. The capacity of stable isotope ratios to differentiate among ballpoint inks as well as gel inks shows that stable isotope analysis may be a useful and quantifiable investigative technique for questioned document examination, although current sample size requirements limit its utility. Application of the technique in casework will require the development of micro-scale sampling and analysis methods.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science & Justice - Volume 55, Issue 1, January 2015, Pages 27–33
نویسندگان
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