Which method is commonly used to separate and quantify amino acids in a sample?
A. High-performance liquid chromatography (HPLC)
B. Gas chromatography-mass spectrometry (GC-MS)
C. X-ray fluorescence (XRF)
D. Ultraviolet-visible (UV-Vis) spectroscopy
HPLC is commonly used to separate and quantify amino acids in a sample.