Determination of topanol antioxidants in methacrylates using capillary gas-liquid chromatography

This paper presents a method to identify and determine topanol A and topanol O antioxidants in methylmethacrylate and 11-bromoundecylmethacrylate. The method is both simple and rapid. Analysis is performed on a 10 m x 0.53 mm I.D. HP-1 capillary gas chromatography column with a temperature gradient and a high carrier gas flow-rate (16.5 ml/min). Quantitation is by internal standardisation. Validation of the method is described for both topanols at concentrations of approximately 50 ppm in methylmethacrylate and 250 ppm in 11-bromoundecylmethacrylate.