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A probe for supporting a sample in an ion source of a mass spectrometer comprises a target formed by a copper probe tip for a liquid sample in which the sample passes through a fine bore 18a of the tip on to the end surface of the tip where it is held as a droplet by surface tension. In order to rep

A probe for supporting a sample in an ion source of a mass spectrometer comprises a target formed by a copper probe tip for a liquid sample in which the sample passes through a fine bore 18a of the tip on to the end surface of the tip where it is held as a droplet by surface tension. In order to replenish the droplet surface, capillary tubing leads from a syringe to the inlet end of the bore in the probe tip.

대표청구항 ▼

Mass spectrometry apparatus for use in the continuous analysis of a sample of which the composition may, or may not, change with time, which comprises a high vacuum system; means for depositing a supply of the sample on a surface located within the high vacuum system, the depositing means including

Mass spectrometry apparatus for use in the continuous analysis of a sample of which the composition may, or may not, change with time, which comprises a high vacuum system; means for depositing a supply of the sample on a surface located within the high vacuum system, the depositing means including a vessel for containing the sample and a duct extending between the vessel and the surface, the duct including a capillary tube, and means for forcing the sample from the vessel along the duct to the surface; means for ionising the deposited sample in situ on the surface; and means for mass analysing the ions so produced.