摘要:
A method for degassing a fluid includes providing a degassing system having a degassing module and a fluid pump apparatus having a fluid reservoir, wherein the fluid pump apparatus is operated in a discontinuous mode involving one or more discrete pumping cycles having a first cycle time. The fluid pump apparatus is calibrated to deliver a predetermined volume of the fluid from the fluid reservoir during each of the pumping cycles, and the degassing module is adapted to operably move gas from the fluid to an extent sufficient to render the fluid volume to a desired degassed condition within a period of time that is not greater than the first cycle time.
摘要:
A fluid analysis apparatus for containing and analyzing a fluid sample includes a cell body assembly having a plurality of distinct portions in fluid communication with one another and with the distinct portions being hydraulically sealed to one another through the use of one or more resilient gaskets interposed between adjacent ones of the plurality of distinct portions of the cell body assembly. The one or more resilient gaskets enable both hydraulic sealing of adjacent distinct portions, as well as fluid coupling and routing through the fluid analysis apparatus.
摘要:
A fluid analysis apparatus includes a cell body having a chamber disposed therein for containing fluid during analysis thereof. The chamber is specifically configured to operably and statically secure a radiant energy guiding member solely through surface-to-surface interaction.
摘要:
A fluid analysis apparatus for containing and analyzing a fluid sample includes a cell body assembly having a plurality of distinct portions in fluid communication with one another and with the distinct portions being hydraulically sealed to one another through the use of one or more resilient gaskets interposed between adjacent ones of the plurality of distinct portions of the cell body assembly. The one or more resilient gaskets enable both hydraulic sealing of adjacent distinct portions, as well as fluid coupling and routing through the fluid analysis apparatus.
摘要:
An apparatus for removing gas bubbles from a fluid includes a fluid inlet and a separation chamber that is in fluid communication with the fluid inlet. The separation chamber has first and second end portions, with the first end portion being operably oriented gravitationally above the second end portion. The apparatus further includes a first gas-permeable, liquid-impermeable membrane disposed in the separation chamber and extending substantially along a first axis defined as extending between the first and second end portions. A permeate side of the membrane is exposed to an environment having a second partial pressure of a target gas, which second partial pressure is lower than a first partial pressure of the gas in the fluid.
摘要:
A method for controlling pervaporation through a membrane includes assessing the vapor pressure of each component material of a mobile phase disposed on a retentate side of the membrane, and maintaining a designed environment on a permeate side of the membrane. The environment maintained on the permeate side of the membrane contains partial pressures of selected component materials of the mobile phase at a level substantially equal to or greater than the respective vapor pressures thereof.
摘要:
A method for controlling pervaporation through a membrane includes assessing the vapor pressure of each component material of a mobile phase disposed on a retentate side of the membrane, and maintaining a designed environment on a permeate side of the membrane. The environment maintained on the permeate side of the membrane contains partial pressures of selected component materials of the mobile phase at a level substantially equal to or greater than the respective vapor pressures thereof.
摘要:
A filter apparatus for use in liquid chromatography systems includes a housing component having an open channel formed therethrough for operably receiving fluid transfer tubing in at least a first end thereof, a relatively thin mesh filter component, and a securement component configured to matingly engage with the housing such that the filter component is operably disposed and secured between the housing and the securement component adjacent to and superimposed over a second open end of the channel. The filter apparatus is thus adapted to operably filter chromatographic fluids being drawn through the channels from the second open end and into the fluid transfer tubing.
摘要:
A liquid degassing apparatus is arranged to limit pervaporation through a membrane by establishing a pervaporation control space at a permeate side of the membrane. The pervaporation control space is defined in a vacuum chamber between the membrane and a shield member. The shield member may be substantially gas and liquid impermeable to maintain an environment in contact with the permeate side of the membrane that is relatively rich in solvent vapor concentration, thereby limiting further liquid pervaporation across the membrane.
摘要:
An elongated flow-through degassing apparatus includes an elongated gas permeable outer shell and one or more gas-permeable, liquid-impermeable elongated inner conveyance members extending within the outer shell and at least partially through a chamber defined within the outer shell. The apparatus also includes inlet and outlet junctions for securing the outer shell to the inner conveyance member. The outer shell exhibits a first permeance that is substantially greater than a second permeance of the inner conveyance member. The degassing apparatus may be sufficiently flexible so as to be readily manipulatable into desired configurations.