Solutions of tris(hydroxymethyl)aminomethane (Tris) have been shown to be a convenient primary standard for the Kjeldahl analysis. This compound is readily available in analytical reagent grade and has all the desirable properties of a primary standard. It is unnecessary to protect the Tris solution from C02, as any reaction between Tris and this gas cannot be detected by the titrimetric proced...

Three new methods using titrimetric and spectrophotometry are described for the determination of Propranolol Hydrochloride (PPH) and Atenolol (AN) with potassium bromate as the oxidimetric reagent and acid dyes, Methyl orange and Indigo carmine. In direct titrimetric (method A), the drug is titrated directly with bromate in acid medium and in the presence of excess of bromide using methyl orang...

Two titrimetric and one spectrophotometric methods are described for the determination of albendazole in pure form and in formulations. In direct titrimetric procedure (Method A), the drug is titrated directly with N-chlorosuccinimide solution in hydrochloric acid medium using indigo carmine as indicator. In back titrimetry (Method B) the drug is treated with a measured excess of the oxidant in...

We evaluated and inter-compared several newer methods for CO2 analysis--titrimetric (Van Slyke), automatic titrator, continuous-flow/indicator, and coupled-enzyme procedures--with respect to accuracy, precision, specificity interferences, and management criteria. All methods studied appeared to be clinically acceptable; but precision decreased (standard deviations increased) for the last two me...