A high enrichment factor, 200, was obtained. The detection limit
(3σ) of copper was 0.34g l−1. The precision of the method, evaluated by seven replicate analyses of solutions containing
5g of copper was satisfactory and the relative standard deviation was 1.7%. The adsorption of copper onto Ambersorb
572 can formally be described by a Langmuir equation with a maximum adsorption capacity of 14.3 mg g−1 and a binding
constant of 0.00444 lmg−1.