Du Preez, J.L.; Lotter, A.P.; Verwoerd, Daniel Wynand
(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
The anthelmintic, levamisole, was determined in sheep plasma by means of ion-pair solid-phase extraction
(SPE) and reverse-phase liquid chromatography. The SPE columns were conditioned with 2 ml
of methanol followed by ...