RECOVERY UNIT FOR MASS-SPECTROMETRIC DETERMINATION OF HYDROGEN ISOTOPIC COMPOSITION OF WATER AND ORGANIC OXYGEN-CONTAINING COMPOUNDS

摘要

FIELD: chemistry.;SUBSTANCE: recovery unit of a system for hydrogen isotopic mass-spectrometric analysis of water and organic oxygen-containing compounds, made in form of a pipe furnace, solid-electrolyte electrochemical oxygen-conducting cell, placed coaxially in the pipe furnace and having a solid-electrolyte ceramic pipe with current leads, working electrodes deposited in form of films on its inner and outer sides, and a comparison electrode lying on the outer side of the solid-electrolyte pipe with a gap from the outer working electrode, and a control and information processing unit which is electrically connected to electrodes of the cell, electrically connected through current leads to electrodes of the cell; the cell is provided with an additional catalyst in form of platinum wire placed in the ceramic pipe with possibility of mechanical contact with the working electrode on its entire length and twisted at the ends, and units for connecting the cell with the system, which are made in form of metal housings with through-holes in which spacers and fixing screws are used to mount a capillary for feeding the sample on one side and the ceramic pipe of the cell on the other side. The twisted wire ends are placed in holes of the housings of the unit and are in contact with walls thereof.;EFFECT: high reliability of the obtained isotope data owing to full control of the processes of decomposition of water molecules and organic oxygen-containing molecules in order to obtain hydrogen using a minimum analysed sample.;2 cl, 1 tbl, 2 dwg