Device for identifying at least one gaseous component in a gaseous or liquid sample

A device for identification of a gaseous component in a liquid sample, comprising:

• 1) a sensor comprising a lipophilic polymer material, at least one ionophore, and ion forming material for forming at least one ionic species from the gaseous component or from the gaseous component and a further component that is present in and/or on the sensor, said at least one ionophore having a sensitivity for the at least one ionic species, and
• 2) a hydrophobic gas-permeable membrane for preventing permeation of ions dissolved in the liquid sample, but permitting permeation of said gaseous component, one side of which is in contact with the liquid sample, said hydrophobic gas-permeable membrane being positioned upon said sensor to prevent direct contact between said sensor and said liquid sample and wherein said hydrophobic gas-permeable membrane is supported by said sensor,
• wherein said identification of said gaseous component is performed by quantitating changes induced by reaction of said ion forming material with said gaseous component, or a reaction product of said gaseous component and said further component, said reaction generating said at least one ionic species.