Capillary valve that can be pulsed

Details Capillary valve that can be pulsed Capillary valve that can be pulsed

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/06 (2006.01)

Patent

CA 2404338

The invention relates to a capillary valve that can be pulsed and to the use thereof. The aim of the invention is to configure the capillary valve in such a way that said valve is suitable for small sample quantities, whereby said valve can be pulsed. The aim of the invention is also to provide a use for said capillary valve. A capillary (1) which has a narrowed section that is embodied as a nozzle (2), a tappet (3) that is situated in said capillary, can be moved therein and, together with the narrowed section of the capillary, can form a sealing as well as a drive for the tappet (8) are provided. The invention also relates to the use of the capillary valve as a gas supply for an ion source or as a gas supply for a UV/fluorescence cell, whereby said valve can be pulsed.

L'invention concerne une vanne capillaire à impulsions et son utilisation. L'invention a pour but de réaliser une vanne capillaire à impulsions qui soit appropriée pour de très faibles quantités d'échantillons et de spécifier l'utilisation d'une telle vanne. A cet effet, l'invention est caractérisée en ce qu'il est prévu un capillaire (1) présentant une étranglement, réalisé sous la forme d'une buse (2), une tige-poussoir (3) située dans le capillaire et pouvant s'y déplacer, et pouvant former, conjointement avec l'étranglement du capillaire, un joint d'étanchéité, ainsi qu'un entraînement pour la tige-poussoir (8). L'invention concerne en outre l'utilisation de la vanne capillaire à impulsions comme moyen d'écoulement d'un gaz pour une source d'ions ou comme moyen d'écoulement d'un gaz pour une cellule à UV/fluorescence.

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