Host–Guest Extraction of Heavy Metal Ions with<i> p</i>-<i>t</i>-Butylcalix[8]arene from Ammonia or Amine Solutions

<div>FTIR spectra of (a) H<sub>8</sub>L and (b) Cd<sup>2+</sup>-H<sub>8</sub>L.</div>

International Journal of Analytical Chemistry

Figure 9: Host–Guest Extraction of Heavy Metal Ions with<i> p</i>-<i>t</i>-Butylcalix[8]arene from Ammonia or Amine Solutions 