Patent ID: 6884356

Claim:
Apparatus for measurement of boron at very low concentration in water or other solvent comprising: (a) a source of a sample of said water or other solvent which may contain boron; (b) a source of a sample of said water or other solvent which is substantially free of boron; (c) a source of substantially intrinsic polyol solution, said polyol capable of forming a complex with boric acid and/or anions of boric acid; (d) a contacting system for: (i) contacting a portion of said intrinsic polyol solution intermittently with said sample of said water or other solvent which may contain boron thereby forming a first volume of liquid comprising said polyol and said water or solvent; and (ii) intermittently contacting a portion of said intrinsic polyol solution with said sample of said water or other solvent substantially free of boron thereby forming a second volume of liquid comprising said polyol and said water or other solvent substantially free of boron; (e) a conductance measuring unit for measuring electrical conductance of said first volume of liquid and, alternatively, of said second volume of liquid; and, (f) a correlating system for correlating boron concentration in said water or other solvent with said conductance of said first volume of liquid and said conductance of said second volume of liquid.