A New Spectrophotometric Reagent for Fe(III): 2-(2,3-Dihydroxy-4-oxocyclobut-2-enylidene) Hydrozinecarbothiamide and Its Application in Real Samples

<table>Calibration curve for Fe(III), <svg height="14.3375" id="M36" style="vertical-align:-3.13504pt" version="1.1" viewbox="0 0 18.975 14.3375" width="18.975" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.3375)">
<g transform="translate(72,-60.53)">
<text transform="matrix(1,0,0,-1,-71.95,63.71)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐶</tspan>
</text>
<text transform="matrix(1,0,0,-1,-63.56,60.58)">
<tspan style="font-size: 8.75px; " x="0" y="0">𝐿</tspan>
</text>
</g>
</g>
</svg> = 4 <svg height="8.7875004" id="M37" style="vertical-align:-0.3135pt" version="1.1" viewbox="0 0 10.125 8.7875004" width="10.125" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,8.7875)">
<g transform="translate(72,-64.97)">
<text transform="matrix(1,0,0,-1,-71.95,65.34)">
<tspan style="font-size: 12.50px; " x="0" y="0">×</tspan>
</text>
</g>
</g>
</svg> 10<sup>−4</sup> M; pH = 3; <svg height="10.325" id="M38" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 9.0375004 10.325" width="9.0375004" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.325)">
<g transform="translate(72,-63.74)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐼</tspan>
</text>
</g>
</g>
</svg> = 0.02.</table>

Journal of Chemistry

fig8

Figure 8

Figure 8: A New Spectrophotometric Reagent for Fe(III): 2-(2,3-Dihydroxy-4-oxocyclobut-2-enylidene) Hydrozinecarbothiamide and Its Application in Real Samples 

Figure 8 | A New Spectrophotometric Reagent for Fe(III): 2-(2,3-Dihydroxy-4-oxocyclobut-2-enylidene) Hydrozinecarbothiamide and Its Application in Real Samples 