The page discusses analytical techniques used to measure the amount of analyte in a sample, dividing them into two classes: total analysis techniques, which respond to the absolute amount of analyte, ...The page discusses analytical techniques used to measure the amount of analyte in a sample, dividing them into two classes: total analysis techniques, which respond to the absolute amount of analyte, such as gravimetry and titrimetry, and concentration techniques, which respond to analyte concentration, like spectroscopy and electrochemistry.