Direct Extraction and Determination of Free Nicotine in Cigarette Smoke

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Time (min)</td><td class="align_center">Determined value (mg/cig)</td><td class="align_center">RSD (%, <i>n</i> = 5)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">20</td><td class="align_center">0.655</td><td class="align_center">4.2</td></tr><tr><td class="align_left">40</td><td class="align_center">0.718</td><td class="align_center">4.2</td></tr><tr><td class="align_left">60</td><td class="align_center">0.735</td><td class="align_center">1.5</td></tr><tr><td class="align_left">80</td><td class="align_center">0.741</td><td class="align_center">3.0</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td><div>Sonics: 44 kHz, 250 W; RSD, relative standard deviation; through the constant injection of cold water, the water temperature was maintained at 30°C.<br/></div></td></tr></table>

<div>Ultrasonic oscillation extraction with different times.</div>

Journal of Analytical Methods in Chemistry

tab3

Table 3

Table 3: Direct Extraction and Determination of Free Nicotine in Cigarette Smoke 