Standard Test Method for Determination of Denatonium Benzoate in Engine Coolant by HPLC

Importancia y uso:

4.1 This test method provides for the qualitative and quantitative determination of denatonium benzoate in engine coolant in milligrams per litre to low percent range and requires approximately 1 mL per test, with results available in less than 10 min. Denatonium benzoate is a compound composed of a quaternary ammonium cation, denatonium and an inert anion, benzoate. In solution the denatonium benzoate exists in equilibrium between the denatonium benzoate compound, the denatonium cation and benzoate anion. By slightly adjusting the pH of the solution to be more acidic (≈ pH 4.6) the equilibrium will be shifted to the direction of forming more denatonium and benzoate ions in the solution.

Subcomité:

D15.04

Volúmen:

15.05

Número ICS:

71.100.45 (Refrigerants and antifreezes)

Palabras clave:

analytical method; antifreeze; Bitterant; chromatography; denatonium benzoate; denatonium ion; engine coolant; HPLC;