Simultaneous Determination of Three Coumarins in <i>Angelica dahurica</i> by <sup>1</sup>H-qNMR Method: A Fast and Validated Method for Crude Drug Quality Control

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Relaxation delay (s)</td><td class="align_center">1</td><td class="align_center">5</td><td class="align_center">10</td><td class="align_center">20</td><td class="align_center">50</td><td class="align_center">100</td></tr><tr><td class="align_left">Integral area</td><td class="align_center">0.71</td><td class="align_center">0.7</td><td class="align_center">0.68</td><td class="align_center">0.71</td><td class="align_center">0.69</td><td class="align_center">0.69</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Effect of relaxation delay on the integral area.</div>

Journal of Analytical Methods in Chemistry

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Table 1

Table 1: Simultaneous Determination of Three Coumarins in <i>Angelica dahurica</i> by <sup>1</sup>H-qNMR Method: A Fast and Validated Method for Crude Drug Quality Control 

Table 1 | Simultaneous Determination of Three Coumarins in Angelica dahurica by 1H-qNMR Method: A Fast and Validated Method for Crude Drug Quality Control 