Scheme 1From: Potentiometric detection and removal of copper using porphyrinsThe structure of the TAPP porphyrin. The figure presents the chemical structure of 5,10,15,20-tetrakis(4-allyloxyphenyl) porphyrin (TAPP) which was used in the paper as ionophore in a new copper-selective sensor and as adsorbent for copper removal from synthetic samples.Back to article page