Optimization of SPE/GC/HPLC Analytical Procedure for Determination of Phenol, Quinones, and Carboxylic Acids in Water Samples

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="680929.fig.002a" src="https://static.hindawi.com/articles/isrn/volume-2012/680929/figures/680929.fig.002a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Concentration of benzoquinone in the eluent.</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="680929.fig.002b" src="https://static.hindawi.com/articles/isrn/volume-2012/680929/figures/680929.fig.002b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Concentration of benzoquinone in the water matrix after SPE.</td></tr></table></td></tr></table>

<table>The recovery of benzoquinone in the presence of acetic anhydride and without anhydride (eluent 5 cm<sup>3</sup> dichloromethane).</table>

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Figure 2: Optimization of SPE/GC/HPLC Analytical Procedure for Determination of Phenol, Quinones, and Carboxylic Acids in Water Samples 