Method and apparatus for picking up liquid sample material, such as blood serum, in a sample pick-up probe and for ejecting the sample from the probe into a reagent chemically reactive with the sample for analysis. Before ejecting the sample from the probe, the probe is inserted into the reagent for...http://www.google.de/patents/US4000973?utm_source=gb-gplus-sharePatent US4000973 - Sample residue cleaning system for biological analyzers
