| 摘要 |
PROBLEM TO BE SOLVED: To monitor a hypochlorous acid concn. in the produced strongly acidic water without using a color reagent and also to increase its measuring accuracy. SOLUTION: The strongly acidic water and the strongly alkaline water produced at an electrolytic cell 11 are conducted respectively to each individual liq. tank 62 and 63 of an air open type first liq. tank 61, then each liq. is sent to an air open type second liq. tank 67 by suction tubes 64 and 65 and shear pumps 73 and 74, and the liq. is forcively agitated by a stirrer 71 to sufficiently mix both liquids, and the mixture is sent to a flow cell 31 by a suction tube 68 and a shear pump 75. The flow cell 31 is irradiated with a light from a light source 32, and transmitted light is bisected by a beam slitter 33, and one side is conducted to a photocell 36 via an optical filter 34 transmitting near 292 nm wave length and the other side is conducted to a photocell 37 via an optical filter 35 transmitting >=400 nm wave length respectively, and the hypochlorous acid concn. is obtained from their detected output. |
