Inter alia, an isolation means for an automated analyzer to assay a test sample in a cuvette which is conveyed along an event path, the said cuvette having a bottom wall, a side wall and an open top, the said cuvette containing a labeled reagent and a solid-phase reagent which has paramagnetic particles which have reacted to form a detectable product, characterised in that it comprises: (a) magnetic means along the said event path for attracting the said paramagnetic particles against the side wall of the said cuvette; (b) liquid evacuating means for aspirating the liquid from the said cuvette while the said paramagnetic particles are held against the side wall of the said cuvette; (c) liquid dispensing means which are located downstream of the said magnetic means for dispensing a re-suspend liquid into the said cuvette for re-suspending the said paramagnetic particles in the said re-suspend liquid; and (d) control means including a central processing unit for coordinating the said evacuating means, the said liquid dispensing means and means for conveying the said cuvette along the said event path is disclosed.