This document specifies a method to determine the content of free pentachlorophenol (PCP), and tetrachlorophenol- (TeCP), trichlorophenol- (TriCP), dichlorophenol- (DiCP), monochlorophenol- (MoCP) isomers. The procedure also releases chlorophenols from salts and esters. The method is applicable to natural and synthetic textiles, including coated fabrics and clothing components (e.g. buttons, zippers, etc.).