High pressure connect fitting

An analytical instrument fitting assembly fitting assembly for coupling first and second analytical fluid conduits, the fitting assembly comprising:

• (a) a first fitting defining a central passage adapted to receive a first fluid conduit defining an internal diameter of no greater than 0.040 inch;
• (b) a second fitting defining a central passage extending between first and second ends and is in fluid communication with the first fitting;
• (c) a separation device disposed within the central passages of the first and second fittings to selectively separate liquids passing therethrough;
• (d) a retractable end fitting at least partially disposed within the second end of the second fitting, the retractable end fitting having:
• (i) a housing;
• (ii) a tube extending within the housing, the tube having a first end in fluid communication with the first fitting and a second end adapted to receive a second fluid conduit defining an internal diameter of no greater than 0.040 inch;
• and
• (iii) a biasing member extending between the housing and a washer slidably disposed on the tube, wherein the washer is movable relative to the housing to allow selective positioning of the tube within the housing relative to the second end of the second fitting to minimize dead space between the tube and the second end of the second fitting;
• and
• (f) a restraint slidingly engaging at least one of the second fitting and the housing to prevent rotation of the housing relative to the second fitting, wherein the restraint limits movement of the housing relative to the second fitting to a longitudinal direction.