Abstract: A system reduces unwanted noise due to pump movement. The system includes a pump including a non-conductive piston extending into a pumping chamber for pumping the sample fluid along an analysis fluid path, a wash chamber, and a seal fluidly separating the pumping chamber from the wash chamber. The system also includes a wash path supplying a wash fluid from a wash reservoir to the wash chamber, an electrical conductor electrically connecting the analysis fluid path to the wash fluid path, and a ground conductor electrically connecting the electrical conductor to ground via a resistor. The electrical conductors and resistor combination between the chambers reduces unwanted noise in the conductivity detector due voltage potentials between the eluent and wash chambers created as the piston moves between the chambers.

Abstract: A system reduces unwanted noise due to pump movement. The system includes a pump including a non-conductive piston extending into a pumping chamber for pumping the sample fluid along an analysis fluid path, a wash chamber, and a seal fluidly separating the pumping chamber from the wash chamber. The system also includes a wash path supplying a wash fluid from a wash reservoir to the wash chamber, an electrical conductor electrically connecting the analysis fluid path to the wash fluid path, and a ground conductor electrically connecting the electrical conductor to ground via a resistor. The electrical conductors and resistor combination between the chambers reduces unwanted noise in the conductivity detector due voltage potentials between the eluent and wash chambers created as the piston moves between the chambers.

Abstract: An extraction cell assembly includes a cell body, a cap assembly having a cap body and a cap insert, a bed support and a seal. The cap body is removably secured to the cell body and includes a throughbore and a peripheral wall. The cap insert includes a plunger, a peripheral flange extending outwardly from the plunger, and a recess disposed within the plunger. The flange and plunger of the cap insert are slidably received, respectively, inside the peripheral wall and throughbore of the cap body. The bed support is removably received within the recess. The seal is removably received within the throughbore. The seal forms a fluid seal between the cell body and the cap assembly when the cap assembly is secured to the cell body. A method of using the extraction cell assembly is also disclosed.

Abstract: An extraction cell assembly includes a cell body, a cap assembly having a cap body and a cap insert, a bed support and a seal. The cap body is removably secured to the cell body and includes a throughbore and a peripheral wall. The cap insert includes a plunger, a peripheral flange extending outwardly from the plunger, and a recess disposed within the plunger. The flange and plunger of the cap insert are slidably received, respectively, inside the peripheral wall and throughbore of the cap body. The bed support is removably received within the recess. The seal is removably received within the throughbore. The seal forms a fluid seal between the cell body and the cap assembly when the cap assembly is secured to the cell body. A method of using the extraction cell assembly is also disclosed.

Abstract: A degas assembly including a low pressure fluid channel for carrying a wash fluid at a first pressure, a pressurized channel for carrying eluent including a gas at a second pressure higher than the first pressure, and a degas separator defining a fluid barrier between the low pressure fluid channel and pressurized fluid channel, the separator configured to retain liquid in the pressurized fluid channel and allow gas to flow through the separator to the low pressure fluid channel. The pressurized fluid channel may extend along an outer periphery of the low pressure fluid channel. The eluent may be received from an eluent generator at a pressure of at least about 3300 psi, and in various embodiments up to about 5000 psi. A liquid chromatography system and method are also disclosed.

Abstract: A container or receptacle for a freezer comprises a flexible polymeric material having the shape and contour of the freezer and is adapted to be inserted into and attached to the freezer which may then be used in a conventional manner. Frost builds up on the container rather than on the walls of the freezer. To defrost the freezer, the contents are removed, and the container is removed and replaced with another container; or the removed container is flexed to remove the frost therefrom, and replaced in the freezer.