[Measurement Method] Spectrophotometry, infrared spectroscopy [Measurand] Absorption spectra [Measurement Technique] 
Spectroscopy
A c o u s t i c s
C h e m i s t r y
C o n d u c t o m e t r y
G r a v i m e t r y
O p t i c s
P a r t i c l e A n a l y s i s
P h y s i c s
P o t e n t i o m e t r y
R a d i o m e t r y
S p e c t r o s c o p y