Sample analysis apparatus

An apparatus for analyzing liquid samples packed in tubes ( 6 ) closed with a top ( 7 ) capable of being perforated, includes a support ( 4 ) for the tubes and a unit ( 8 ) for sampling an aliquot from each tube and delivering it into a receptacle for treatment and/or analysis, the unit ( 8 ) including a hollow needle ( 45 ) connected to a suction/delivery device and vertically mobile; the support ( 4 ) has a circular tray provided with several tube-holders ( 5 ) on its periphery and capable of rotating about a vertical axis to bring a position successively and selectively the tubes ( 6 ) borne by the tube-holders ( 5 ) in line with the unit ( 8 ); each tube-holder ( 5 ) is connected to the tray ( 4 ) through a linkage ( 31 ) with two degrees of freedom.