A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td align="left" rowspan="2">Sample taken (mL)</td><td align="center" colspan="2">Se (ng mL<sup>−1</sup>)</td><td align="center" rowspan="2">Recovery (%)</td><td align="center" rowspan="2">% RSD for triplicate measurements</td></tr><tr class="thead"><td align="center"></td><td align="center">added</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td align="left">1</td><td align="center">0</td><td align="center">48.28</td><td align="center">—</td><td align="center">1.89</td></tr><tr><td align="left">1</td><td align="center">10</td><td align="center">58.17</td><td align="center">98.9</td><td align="center">1.97</td></tr><tr><td align="left">1</td><td align="center">20</td><td align="center">67.54</td><td align="center">96.3</td><td align="center">2.10</td></tr><tr><td align="left">1</td><td align="center">30</td><td align="center">76.70</td><td align="center">94.8</td><td align="center">2.14</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Determination of selenium in Centrum tablet.

International Journal of Analytical Chemistry

tab4

Table 4

Table 4: A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction 

Table 4 | A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction 