Chinese Journal of Magnetic Resonance >
Dating Oily Ballpoint Pen Hand-Writings by 1H NMR Spectroscopy
Received date: 2015-06-01
Revised date: 2016-04-18
Online published: 2016-06-05
Dating ballpoint pen hand-writings is a hot topic in forensic science. It remains untested whether NMR spectroscopy is suitable for this task. In this study, six types of oily ballpoint pen ink were characterized by 1H NMR spectroscopy. The same method was also used to measure the changes of 2-phenoxyethanol content in oily ballpoint pen hand-writings with aging. A standard curve was established based on the experimental results. It was demonstrated that, as long as the brand of the oily ballpoint pen used was known, hand-writings made within 4 months could be dated precisely. The effects of artificial aging and natural aging were compared subsequently. It was found that ten minutes in ultraviolet aging box corresponded to approximately one day of natural aging.
Key words： oily ballpoint pen; writing time; 1H NMR; 2-phenoxyethanol
ZHENG Jin , XUE Hui-yun , LIN Cai-feng , LIN De-xun , LU Jia , YANG Hui , WANG Xiang-peng , ZOU You-si . Dating Oily Ballpoint Pen Hand-Writings by 1H NMR Spectroscopy[J]. Chinese Journal of Magnetic Resonance, 2016 , 33(2) : 198 -207 . DOI: 10.11938/cjmr20160203
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