Concentration apparatus for quantitative analysis of a substance in a liquid

Claim 1

APPARATUS FOR TREATING A LIQUID FOR QUANTITATIVE ANALYSIS IN RESPECT TO A SUBSTANCE PRESENT THEREIN IN A SMALL QUANTITY, COMPRISING A VESSEL MOUNTED FOR ROTATION ABOUT ITS LONGITUDINAL AXIS AND HAVING A DOWNWARDLY INCLINED INNER SURFACE MEANS FOR ROTATION SAID VESSEL ABOUT SAID AXIS, MEANS FOR HEATING SAID VESSEL WHILE IT IS BEING ROTATED ABOUT SaID AXID, AN INLET TUBE FOR SAID LIQUID HAVING ITS OUTLET END POSITIONED ABOVE THE BOTTOM OF SAID VESSEL ADJACENT SAID INNER TURFACE SO THE LIQUID ADMITTED THROUGH SAID INLET END FLOWS DOWN AND AROUND SAID INNER SURFACE DURING THE ROTATION OF SAID VESSEL TO FORM A LIQUID FILM THEREON FOR EFFECTING A RAPID EVAPORATION OF A PORTION OF SAID LIQUID AS IT FLOWS TO THE BOTTOM OF SAID VESSEL, AN OUTLET TUBE HAVING ITS INLET END ADJACENT THE BOTTOM OF SAID VESSEL FOR WITHDRAWING THE HEATED LIQUID THEREFROM IN THE FORM OF A STREAM, SAID TUBES BEING STATIONARY AND SAID VESSEL BEING ROTATED AROUND THE AXES OF SAID TUBES BY SAID ROTATING MEANS WHILE THE FLASK IS BEING HEATED AND MEANS IN LIQUID FLOW COMMUNICATION WITH SAID OUTLET TUBE FOR TREATING SAID WITHDRAWN LIQUID STREAM FOR ANALYSIS CONCURRENTLY WITH SAID EVAPORATION OPERATION AND ROTAION SAID VESSEL.