Extraction of Artemisinin, an Active Antimalarial Phytopharmaceutical from Dried Leaves of <i>Artemisia annua</i> L., Using Microwaves and a Validated HPTLC-Visible Method for Its Quantitative Determination

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td align="left" rowspan="2">Extraction solvent</td><td align="center" colspan="3">Microwave-assisted extraction (MAE)<sup>a</sup></td></tr><tr class="thead"><td align="center">% mean content of artemisinin (dry wt. basis)</td><td align="center">±Standard deviation</td><td align="center">%RSD<sup>b</sup></td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td align="left">Benzene</td><td align="center">0.809</td><td align="center">±0.017</td><td align="center">2.10</td></tr><tr><td align="left">Toluene</td><td align="center">0.816</td><td align="center">±0.016</td><td align="center">1.96</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td><svg height="10.3145pt" id="M29" style="vertical-align:-0.04979992pt" version="1.1" viewbox="-0.0498162 -10.2647 4.7767 10.3145" width="4.7767pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0095,0,0,-0.0095,0,-5.984)"><path d="M433 39L423 65C413 59 399 54 387 54C370 54 352 69 352 114V299C352 352 342 392 307 422C285 440 255 449 225 449C168 437 102 399 75 379C56 365 44 353 44 339C44 315 69 296 87 296C101 296 111 303 116 319C124 349 133 371 145 385C156 397 171 404 190 404C241 404 275 364 275 291V274C253 256 180 229 120 209C65 190 39 159 39 110C39 47 88 -12 159 -12C189 -12 237 25 277 52C282 35 288 21 301 8C312 -3 333 -12 348 -12L433 39ZM275 84C256 65 221 48 195 48C164 48 124 73 124 124C124 161 146 180 185 198C206 208 254 229 275 240V84Z" id="g190-98"></path><glyph.data ascent="989" descent="-360" horiz-adv-x="439" vert-adv-y="439"></glyph.data></g></svg>MAE conditions: 100 mg, 14 mesh, 160 watts, 120 seconds, 10 mL × 3 cycles of extraction, and cleanup with 2 mL.<br/><sup>
                    b</sup>Relative standard deviation.<br/></td></tr></table>

Finalization of solvent and extraction conditions for microwave-assisted extraction of artemisinin.

Chromatography Research International

tab4

Table 4

Table 4: Extraction of Artemisinin, an Active Antimalarial Phytopharmaceutical from Dried Leaves of <i>Artemisia annua</i> L., Using Microwaves and a Validated HPTLC-Visible Method for Its Quantitative Determination 

Table 4 | Extraction of Artemisinin, an Active Antimalarial Phytopharmaceutical from Dried Leaves of Artemisia annua L., Using Microwaves and a Validated HPTLC-Visible Method for Its Quantitative Determination 