US 9,810,708 B2
Automated sampling system
Kyle R. Elkin, State College, PA (US); and Randall G. Bock, Phillipsburg, PA (US)
Assigned to The United States of America, as represented by The Secretary of Agriculture, Washington, DC (US); and The Penn State Research Foundation, University Park (US)
Filed by The United States of America, as Represented by the Secretary of Agriculture, Washington, DC (US); and The Penn State Research Foundation, University Park, PA (US)
Filed on Nov. 5, 2015, as Appl. No. 14/933,383.
Prior Publication US 2017/0131319 A1, May 11, 2017
Int. Cl. G01N 30/02 (2006.01); G01N 30/96 (2006.01); G01N 35/10 (2006.01); B01D 15/12 (2006.01); G01N 1/40 (2006.01); G01N 35/00 (2006.01); G01N 30/00 (2006.01)
CPC G01N 35/1097 (2013.01) [B01D 15/125 (2013.01); G01N 1/4044 (2013.01); G01N 1/4077 (2013.01); G01N 30/96 (2013.01); G01N 35/00871 (2013.01); G01N 2001/4088 (2013.01); G01N 2030/0095 (2013.01); G01N 2035/00475 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An auto-sampling system for a testing instrument, the system comprising:
a watertight outer shell;
a control unit enclosed within the shell;
a syringe pump in communication with the control unit;
a sample inlet filter in hydraulic communication with the syringe pump, the sample inlet filter comprising:
(a) an unfiltered reservoir having an inlet and an outlet so that the unfiltered reservoir comprises a continuous flow reservoir;
(b) a filtered reservoir smaller than the unfiltered reservoir; and,
(c) a filter element positioned between the filtered reservoir and the unfiltered reservoir;
a syringe pump having a plunger;
an inline digester in hydraulic communication with the syringe pump and the sample inlet filter;
a check valve positioned between the syringe pump and the sample inlet filter;
wherein the system is structured so that, when directed by the control unit, the plunger of the syringe pump is retracted and suction force from the syringe pump causes a sample fluid to move from the unfiltered reservoir into the filtered reservoir, through the inline digester, and through the check valve; when further directed by the control unit, the plunger is advanced, so that the sample fluid is injected back through the check valve and into a testing portion of an instrument.