| 摘要 |
PURPOSE:To enable a frame thermionic detection with even higher sensitivity shown for a nitrogen compound by supplying a trace of hydrogen chloride to an ionization area above a sample ejection nozzle. CONSTITUTION:A hydrogen chloride supply source 2 houses a anticorrosive evaporation tank 2c communicating with an inert gas pressure source 2a including helium on one side thereof and with a hydrogen supply port of a detector 1 through a split mechanism 2b on the other side thereof into a thermostat and has hydrochoric acid 2d poured into the tank 2c. Then, for example, a fixed flow rate of an inert gas is supplied to the evaporation tank 2c of the hydrogen chloride supply source 2 from the pressure source 2a and with a fixed concentration of hydrogen chloride poured into the detector 1, a sample containing a nitrogen compound is injected into a column. This shows a very high sensitivity and selectivity with respect to the nitrogen compound. |
