Measurement apparatus and measurement method

A measurement method by a measurement apparatus, the measurement method comprising:

• applying, by a light source to a measurement chamber, laser light whose wavelength varies, the measurement chamber being spatially connected to a vaporization chamber in which a sample containing a target component is placed, the measurement chamber configured to form enclosed space integrally with the vaporization chamber;
• detecting, by a detector, the laser light that has been applied from the light source and has passed through the measurement chamber;
• and
• calculating, by an arithmetic unit, an amount of the target component contained in the sample by analyzing a light-receiving signal of the laser light detected by the detector,
• wherein the arithmetic unit is configured to acquire the amount of the target component, based on an integral value of a spectrum of absorbance of the laser light that is absorbed by the target component while the laser light passes through an interior of the measurement chamber.