PROBLEM TO BE SOLVED: To provide a water content measuring device that eliminates an effect of substances (solutes) that absorb light other than water (solution) contained in solution to accurately measure water content.SOLUTION: Water content (volume fraction) and concentration of solutes are determined by referring to a graph indicating a coefficient of absorption at temperature T1, a coefficient of absorption at temperature T2, and a change in a coefficient of absorption of ultra pure water for 1°C.COPYRIGHT: (C)2013,JPO&INPIT【課題】溶液に含まれる水(溶液)以外の物質(溶質)による光の吸収の影響を除外し、高精度に水分量の測定が可能な水分量測定装置を提供する。【解決手段】温度T1における吸収係数、温度T2における吸収係数、超純水の1℃あたりの吸収係数の変化を示すグラフを参照して、水分量(体積分率)、溶質濃度を求める。【選択図】図4
