摘要:
A sample injector (200) for use in a fluid separation system (10) for separating compounds of a fluidic sample in a mobile phase, the sample injector (200) comprising a switchable valve (202), a sample loop (204) in fluid communication with the valve (202) and configured for receiving the fluidic sample, a metering device (206) in fluid communication with the sample loop (204) and configured for introducing a metered amount of the fluidic sample on the sample loop (204), and a control unit (208) configured forcontrolling switching of the valve (202) to transfer the sample loop (204) between a low pressure state and a high pressure state via an intermediate state and for controlling the metering device (206) during the intermediate state to at least partially equilibrate a pressure difference in the sample loop (204) between the low pressure state and the high pressure state.
摘要:
An analytical apparatus includes a sample-injection valve, a sample pump, at least two sources of standards, and a selection valve. The sample-injection valve has an output port in fluid communication with a LC column, and an input port in fluid communication with a mobile-phase supply line. The at least two sources of standards are associated with at least two pharmaceutical compounds. The selection valve fluidically and selectably connects the sample pump to the at least two sources of standards, to the sample-injection valve, and to at least two pharmaceutical-manufacturing process lines associated with the at least two pharmaceutical compounds. A method for controlling a pharmaceutical manufacturing process includes switching the selection valve to alternately and repeatedly sample the at least two sources of standards and material flowing through the at least two pharmaceutical-manufacturing process lines.
摘要:
The invention relates to a method for separating compounds in the load of a chromatography device comprising a load loop, characterised in that the loop is movable between a load loading position and a load injection position into the device, and is maintained under a pressure higher than the atmospheric pressure in the different positions. The invention is used for preventing a pressure variation that would be detrimental to the device and the separation method.
摘要:
A flow through isolation valve having a stationary member; a movable member, with a surface of the stationary member interfacing with a surface of the movable member; and at least one pin isolation valve. The pin isolation valve has a flow through internal conduit and is movable so that the internal conduit can fluidically communicate with at least one blank opening in the movable member and with a flow through internal conduit in the movable member. Movement is by rotation, linear or curvilinear translation. At least one pin isolation valve is fluidically coupled typically to a sample loop of a face seal valve, or to a pump supplying high pressure liquid to or to a column discharging liquid from a face seal valve of a high pressure liquid chromatography (HPLC) system or directly to the face seal valve.
摘要:
The storage medium (20) stores multiple samples of liquid and is movable for providing those samples from a loading position to a position where the samples can be transferred to an analysis system. The storage medium is capable of receiving and holding small liquid samples of about 100 nanoliters volume or less, with such storage medium having the mobility of allowing one liquid sample to be loaded at a loading position, before being provided to a transfer location via tubing (20) for transfer to an analysis system location while another liquid sample is loaded at the loading location in an automated manner. This processing system can be applied to the high technology fields of liquid chromatography and biological material analysis through the use of a storage medium that comprises plurality of micro-bores (22) and holds liquid samples within through the capillary attraction action type of fluid drawing effect within such bores.
摘要:
An injection valve assembly with looping internal sample loop works to inject discrete fluid samples into analytical instrumentation. The assembly provides an internal sample loop that carries the fluid sample follows an outwardly looping path. This looping deposition enables internal sample loop to have a uniform cross section and a larger sample volume of fluid; thereby creating enhanced peak shape in chromatography readings. The assembly provides a stator defined by stator openings, and a rotor defined by rotor grooves. The rotor grooves are arranged to form a rotor circumference. A stator face engages the stator to maintain operational engagement between the stator and the rotor. Internal sample loop is defined by a generally looped shape and an inner tube diameter. Internal sample loop follows a path at least partially outside the rotor circumference; whereby more than half of the length of internal sample loop is outside the rotor circumference.
摘要:
A shear valve for use in a high performance liquid chromatography system. The shear valve includes a first valve member having a plurality of first fluid-conveying features, and a second valve member having one or more second fluid-conveying features. The second valve member is movable, relative to the first valve member, between a plurality of discrete positions such that, in each of the discrete positions, at least one of the one or more second fluid- conveying features overlaps with multiple ones of the first fluid conveying features to provide for fluid communication therebetween. At least one of the first and second valve members is at least partially coated with a protective coating that includes an adhesion interlayer and a diamond-like carbon (DLC) layer. The DLC layer is deposited on the adhesion interlayer via filtered cathodic vacuum arc (FCVA) deposition.
摘要:
La présente invention concerne un dispositif (1) d'alimentation automatique d'un chromatographe (4) pour la caractérisation physico-chimique d'un matériau par chromatographie gazeuse inverse, caractérisé en ce qu'il comporte une unité d'injection (2) pourvue d'un magasin (3) contenant une pluralité de réservoirs dans lesquels sont stockés des molécules sondes de types différents, un circuit de fluide porteur (8) comportant au moins un tronçon de prélèvement (82) passant par ledit magasin (3) et un tronçon d'alimentation directe (81) disposé en dérivation dudit tronçon de prélèvement (82), des moyens de distribution (22 à 26) sélective des molécules sondes dans au moins une partie dudit fluide porteur pour alimenter ledit chromatographe (4) et des moyens de pilotage (7) automatique des moyens de distribution sélective en fonction de conditions d'expérimentation déterminées et des résultats dudit chromatographe (4).