WATER SAMPLE DILUTION DEVICE AND WATER SAMPLE DILUTION METHOD

摘要

PROBLEM TO BE SOLVED: To accurately measure a dilution magnification ratio (degree of pigmentation) which meets a regulation standard of "appearance" without relying on functional measurement or adopting an expensive device and allow sample water to be automatically diluted.SOLUTION: A water sample dilution device 1 includes: a detection pipe 2 which communicates with a dilution water flow channel 10 and a drain water flow channel 11; a transmitted light amount detection unit 3 which detects a transmitted light amount in the detection pipe 2; a water amount detection unit 4 which detects a water amount in the detection pipe 2; an operation processing unit 5 which obtains a dilution magnification ratio and a transmission ratio of a dilution sample water generated by diluting a specific amount of sample water accumulated in the detection pipe 2 with a dilution water flowing in from the dilution water flow channel 10 on the basis of detection signals of the water amount detection unit 4 and the transmitted light amount detection unit 3; and a flow channel control unit 6 which controls circulations of the dilution water flow channel 10 and the drain water flow channel 11 on the basis of output of the operation processing unit 5. The flow channel control unit 6 causes a specific amount of dilution sample water in the detection pipe 2 to remain and to be discharged by controlling the circulation of the drain water flow channel 11 and then obtains dilution sample water generated by further diluting the specific amount of dilution sample water remaining in the detection pipe 2 with a set amount of dilution water added by controlling the circulation of the dilution water flow channel 10.SELECTED DRAWING: Figure 1