Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages

<div>Adsorption isotherms for tartrazine on magnetic carbon modified at pH values (<svg height="7.66065pt" id="M7" style="vertical-align:-0.3625798pt" version="1.1" viewbox="-0.0498162 -7.29807 5.14486 7.66065" width="5.14486pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M320 255C320 327 260 385 186 385S52 327 52 255S112 125 186 125S320 183 320 255Z" id="g117-74"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="371" vert-adv-y="371"></glyph.data></g></svg>) 5.0, (▲) 7.0, and (□) 9.0.</div>

International Journal of Analytical Chemistry

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Figure 4

Figure 4: Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages 

Figure 4 | Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages 