FTIR provides information about molecular vibrations, complementary to UV-Vis's electronic transitions. FTIR measures the absorption of infrared radiation by a sample, providing information about the chemical bonds present and can be used to identify and quantify different components. Both provide information about the composition of a sample, but FTIR focuses on vibrational modes while UV-Vis focuses on electronic transitions.

HPLC is a separation technique that can be coupled with UV-Vis detection. HPLC separates the components of a mixture, and UV-Vis can be used to detect and quantify the separated components. This makes the combination of the two technologies more powerful.

FT-IR is another name for FTIR. It provides information about molecular vibrations, complementary to UV-Vis's electronic transitions. FT-IR measures the absorption of infrared radiation by a sample, providing information about the chemical bonds present and can be used to identify and quantify different components.