Thermo Fisher Scientific (bremen) Gmbh

Nils Stoebener

Johannes Schwieters

Michael Krummen

Hans-Juergen Schlueter

Eric Wapelhorst

Ronald Seedorf

Jens Radke

Hans-Juerg Jost

Tim Stoltmann

A gas transfer system for transferring gas into an analytical instrument for isotope ratio analysis comprises a capillary for delivering sample and/or reference gas from a gas source, a first connector for connecting the capillary to the gas source, a second connector for connecting the capillary to the analytical instrument, a crimping device, wherein the internal surface of the capillary comprises a coating material to prevent or minimize adsorption of water to the surface. Also provided is a device for regulating gas flow in a gas inlet system of an analytical instrument, comprising a body member having an internal gas flow channel, and a clamping member for attachment to the body member such that when the clamping member is tightened onto the body member, the internal gas flow channel is adjustably and reversibly crimped, to adjust gas flow therethrough.

Inert non-adsorbing crimpable capillaries and devices for adjusting gas flow in isotope ratio analysis

A system for controlling flow of gas in a continuous flow isotope ratio analyser is provided. The system comprises gas inlet and gas outlet lines for providing gas into and from a measuring cell, and at least one switchable flow restriction on the gas inlet line, for selectively controlling gas flow into the isotope ratio analyser. Also provided is a method for determining an isotope ratio using the system according to the invention.

Flow reduction system for isotope ratio measurements

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Bremen, Germany

Nils Stoebener