Polarimetric Determination of Boron

Abstract

A method is given for determining borate under conditions which prohibit the use of more conventional methods such as acid-base titrimetry. This method is based on the formation of a complex by borate ion with mannitol and the measurement of the optical polarization of the complex. Two versions of the method are outlined, one for determining total boron as boric acid or borate salts and the other for determining borate in borohydride salts. (D. L.C.)