Gas inlet insert used for NMR sample tubes comprises gas inlet capillary fixed to frit body which is closed gas-tight outside of gas outlet surface

摘要

A gas inlet insert comprises a gas inlet capillary (2) fixed to a frit body (1) which is closed gas-tight outside of the gas outlet surface. The reaction gas can be guided to the reaction medium via the capillary. Preferred Features: The frit body is shaped on its lower side so that it can be inserted into the base of the sample tube. The frit body is made from a sintered glass and the gas-tight closure is made from a sintered glass layer (3) The capillary extends into the frit body.