This document is a method for determining the total content (solvent extractible) of the following bisphenols: — Bisphenol A — Bisphenol B — Bisphenol F — Bisphenol S This method requires the use of liquid chromatography (LC) with triple quadrupole mass spectrometer (MSMS) or with Diode Araay Detector (DAD) or FLD to identify and quantify the bisphenols.