Apparatus for preparing sample solution for infrared spectrophotometer and method of analyzing sample solution

An apparatus for measuring the infrared spectrum of a component separated by a liquid chromatograph, comprising:

• sample retaining means having a surface made of a substance which reflects infrared radiation, a recessed portion being formed on said surface;
• a dropping tube, having an end portion disposed above said sample retaining means, for receiving effluent from a column of a liquid chromatograph, and through which said effluent flows as a sample solution and from which said sample solution is allowed to drip into said recessed portion of said sample retaining means;
• driving means for driving said sample retaining means continuously or intermittently;
• solvent removing means for depositing a solute of said sample solution dripped in said recessed portion of said sample retaining means by evaporating a solvent of said sample solution;
• and
• an infrared spectrophotometer which emits infrared radiation onto the deposited solute and measures the intensity of the infrared radiation which is absorbed by said solute and reflected back through said deposited solute by a bottom surface of said recessed portion.