CONTINUOUSLY MEASURING INSTRUMENT FOR CONCENTRATION OF DISSOLVED OXYGEN IN HIGH-TEMPERATURE WATER OR HIGH-TEMPERATURE AQUEOUS SOLUTION

摘要

PURPOSE:To allow a stable, automatic and continuous analysis with small long-time errors by installing a bubble separating and removing part just before the flow system of the electrode cell of a dissolved oxygen meter. CONSTITUTION:A structural part 1 of branch pipes is provided just before the flow system of the electrode cell 2 of the dissolved oxygen meter and one system after the branching is connected between through a pump 3, a cooler 5 and a cell 2 to a conduit 16. The other system is connected through a pump 4 to a conduit 16 and respective sample liquids 17 are returned to a sample tank 18. The bubbles surely flow into the pump 4 system if the liquid flow rate ratio on a pump 4 side with respect to a pump 3 side is specified to 1 to 2. The sample liquid to be measured is eventually admitted into the cell 2 and is analyzed after the bubbles are separated and removed in the initial stage before stirring. The continuous measurement is thus executed stably with the small measurement errors in the high-temp. water and the high-temp. aq. soln.