Two Wavelengths Spectrophotometric Method for Monitoring Efficient Vibrationally Milling Synthesis of 1,1-Bi-2-naphthol

An accurate spectrophotometric determination method was developed for monitoring of solid statemechanochemical synthesis of 1, 1'-bi-2-naphthol. the method was used for determination of 1, 1'-bi-2naphtholusing a two wavelength procedure in sodium hydroxide solution. the absorbance difference at 321and 359 nm pair was used for determination of 1, 1-bi-2-naphthol in which 2-naphthol has the sameabsorbances. accuracy and precision of the determination method on the known various mixtures of 2naphtholand 1, 1'-bi-2-naphthol were tested in their binary mixtures. the quantitative results of highperformance liquid chromatography showed satisfactory compatibility with the analytical results obtained bythe proposed determination method