Abstract:
A spray chamber for producing a sample for an analyzer which may contain a plasma torch. In the chamber, a heated sheath gas is fed into the periphery of the spray surrounding the spray, adjacent the origin of the spray, thus reducing the size of droplets which are recirculated, thereby reducing agglomeration of the droplets and promoting rapid drying of the spray. Preferably all of the spray solvent is evaporated in a very short chamber, thus further reducing the amount of spray recirculated, and all of the combined flow of dried particulates from the spray, nebulizing gas and sheath gas is directed into the torch. In one embodiment, the central core of the combined flow is directed to the torch and the peripheral portion of the combined flow is ducted to waste. In another embodiment the aqueous spray solvent is fully evaporated before it leaves the spray chamber, and the combined flow is directed through a membrane dryer before reaching the torch, to remove most of the water vapor from the flow and thus to reduce water vapor loading on the torch.
Abstract:
An Atmospheric Pressure Chemical Ionization (APCI) source interfaced to a mass spectrometer is configured with a corona discharge needle positioned inside an APCI inlet probe assembly. Liquid sample flowing into the APCI inlet probe is nebulized and vaporized prior to passing through the corona discharge region all contained in the APCI inlet probe assembly. The APCI probe is configured to shield the electric field from the corona discharge region while allowing penetration of an external electric field to focus APCI generated ions into an orifice into vacuum for mass to charge analysis. Ions that exit the APCI probe are directed only by external electric fields and gas flow maximizing ion transmission into a mass to charge analyzer. Sample ions and gas phase reagent ions are generated in the APCI probe from liquid or gas inlet species or mixtures of both.
Abstract:
A system includes an analysis system at a first location and one or more remote sampling systems at a second location remote from the first location. A sampling system can be configured to receive a remote liquid sample. The system also includes a sample transfer line configured to transport gas from the second location to the first location. The sample transfer line is configured to selectively couple with a remote sampling system for supplying a continuous liquid sample segment to the sample transfer line. The system can further include a sample receiving line at the first location. The sample receiving line is configured to selectively couple with the sample transfer line and the analysis system to receive the continuous liquid sample segment and supply the sample to an analysis device.
Abstract:
An electrospray ionisation source for generating charged droplets of liquid entrained within a gas flow (109) within a vacuum chamber (107), comprising a liquid insertion capillary (105) for receiving a liquid external to the vacuum chamber and for outputting the received liquid at an output end of the liquid insertion capillary within the vacuum chamber thereby to insert the liquid into the vacuum chamber. A nebuliser part (102, 103) comprises one or more gas flow ducts (103) for receiving a gas (108) external to the vacuum chamber and for outputting the received gas at an output end (1 10) of the nebuliser part comprising output end(s) of the one or more said gas flow ducts within the vacuum chamber. This inserts a gas flow (109) into the vacuum chamber 107). A charger part (1 14, or 217) is provided for charging said droplets of said liquid output by said nebulizer part. The liquid insertion capillary is located within the output end of the nebuliser part so as to position the output end of the liquid insertion capillary within gas flows output by the nebuliser part, in use, to entrain charged droplets of the inserted liquid within flows of the inserted gas.
Abstract:
L'invention concerne l'introduction d'au moins un additif pour l'analyse d'au moins une substance d'intérêt par un spectromètre de masse ou un spectromètre à mobilité d'ion. La substance à analyser est injectée au moyen d'une interface API. L'additif est introduit par ajout au gaz de nébulisation.