KYUKOKODOSOKUTEISHISUTEMU

摘要

PURPOSE:To continuously measure the concn. of the metallic ions in a soln. which is fed by the specified volume each to a means for supplying the specified volume of the soln. by unifying the metallic ions in said soln. to single valency. CONSTITUTION:The sample liquid from a sampling piping 1 is supplied to a measuring piping 2 and flows impulsively by every specified amt. for the specified time by a constant volume supply pump 3 in the piping 2. A flow coulometric device 4 for reduction unifies all the plutonium ions in the sample liquid to quadrivalent and supplies the same to a rotary valve 5. Ce(NO3)3 as an oxidizing agent is supplied from a storage tank 11 to a flow coulometric device 13 for oxidation by the constant volume supply pump 12 in an oxidizing agent piping 10 and is oxidized therein to Ce(NO3)4 which is supplied to a valve 5. The oxidizing agent Ce(NO3)4 is impulsively injected to the sample liquid fed to the valve 5 and is mixed in a reaction cell 6 so as to be unified to the hexad plutonium. This sample liquid is passed through a measuring cell 7 where the output waveform of the absorbancy characteristic is obtd.