Investigation and Discrimination of Ballpoint Pen Inks by Analytical Techniques and Chemometrics

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Technique</td><td class="align_center" colspan="4">DP (no. of groups)</td></tr><tr class="thead"><td class="align_center">Blue (<i>n</i> = 20)</td><td class="align_center">Black (<i>n</i> = 19)</td><td class="align_center">Red (<i>n</i> = 8)</td><td class="align_center">Green (<i>n</i> = 6)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">UV/Vis</td><td class="align_center">0.563 (3)</td><td class="align_center">0.812 (5)</td><td class="align_center">0.678 (3)</td><td class="align_center">0.866 (4)</td></tr><tr><td class="align_left">FTIR</td><td class="align_center">0.605 (4)</td><td class="align_center">0.444 (4)</td><td class="align_center">0.642 (3)</td><td class="align_center">0.866 (4)</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td><div>UV/Vis: UV/visible spectroscopy; FTIR: Fourier transform infrared spectroscopy.<br/></div></td></tr></table>

<div>DP for UV/Vis and FTIR of blue, black, red, and green ballpoint inks calculated by visual analysis.</div>

International Journal of Analytical Chemistry

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Table 2

Table 2: Investigation and Discrimination of Ballpoint Pen Inks by Analytical Techniques and Chemometrics 