Abstract: The numerous advantages of a Soxhlet apparatus are combined with the nice pressure and temperature controls afforded by a pressure vessel to enlarge the scope and efficacy of both pieces of equipment. A judicious selection of solvent, such as CO.sub.2, provides a solvent-free extract which is ideal for gas chromatographic studies and can advantageously be used in an ever-widening spectrum of analyses including research, food and flavor, pheremone analysis and essence extraction. The extraction of oil from coal and oil shale, in comminuted form, is also facilitated by the use of the apparatus operated under reflux conditions, controlled pressure-temperature relations and appropriate choice of extractant.

Abstract: An inlet splitter apparatus and method for introducing substantially unreacted linear aliquots of vaporized sample and carrier gas to the capillary column of a capillary gas chromatograph. An elongate body with separate but axially aligned injector and mixing chambers, an inert (glass) tubular liner interconnecting the separate chambers and having an inlet in the injector chamber and a baffled outlet in the mixing chamber, carrier gas injection means to introduce a stream of carrier gas through an annular passage between the elongate body and tubular liner to an inert core passage in the liner. A sample port and self-sealing septum to facilitate injection of an analysis sample to the inert liner core passage. Heating means (preheater and body heater) to vaporize the sample and pass an intermixed stream of vaporized sample and carrier gas through the inert core passage and baffled outlet of the liner.