Thermometric titration of amines in non-aqueous media with antimony pentachloride

A thermometric titration method in non-aqueous media is proposed for the as say of amines viz., triethylamine, isopropylamine, n-propylamine, di-n-prop ylamine, tri-n-propylamine, n-butylamine, di-n-butylamine, tri-n-butylamine , piperidine, pyridine and aniline in 1,2-dichloroethane solvent at room te mperature with antimony pentachloride as the titrant. The method was found to be highly accurate, having a relative standard deviation of <1.0%. The m ean recovery values show that antimony pentachloride is a good titrant. How ever, addition of two drops of acetic anhydride in the amine solution impro ves the titration curve and the mean recovery value of the amine generally in all titrations. The recovery values indicate that antimony pentachloride does not have any a steric hindrance as a titrant.