ULTRASOUND & MAGNETIC METHOD
A method of processing of a sample mixed with paramagnetic particles comprises exposing the sample mixed with paramagnetic particles to a magnetic field to draw the paramagnetic particles, and then forming an ultrasound standing wave to drive the paramagnetic particles into one or more pressure nodes. Apparatus is also described for the analysis of biological samples which comprises a chamber, an acoustic transducer capable of creating at least one pressure node in a fluid contained in the chamber, and one or more magnets associated with the chamber to attract paramagnetic materials contained in a sample.