PURPOSE: To make it possible to collect continuously sample gas by using an airtight reactor which has a sample liquid injection intake and sodium boron hydride solution injection intake and is equipped with a carrier gas lead-in pipe and generated gas lead-out pipe at its top and with an exhaust mouth at its bottom.
CONSTITUTION: The hydrogen arsenide generator, for example, for atomic absorption analysis consists mainly of reaction bottle 1 and reduced sample injection intake 2 and sample intake 3 are provided on its flank. Into the bottle, solution 4 of sodium boron hydride is previously injected from injection intake 2. An acidic arsenic solution is injected from injection intake 3 and hydrogen arsenide is produced through the reducing reaction. The produced gas supplied to the atomizing part of the atomic absorption analyzer from lead-out pipe 6 by carrier gas supplied from carrier gas pipe 5. After the measurement of one sample ends, water is flowed from branch pipe 7 of carrier gas pipe 5 to wash the inside of the bottle and the reaction solution is exhausted out from exhaust mouth 8 at the bottom repeat the above-mentioned processes.
SAITOU KAORU
KOJIMA MORIAKI
