An automated distillation method for the determination of diacetyl in beer: a comparison of analysis by AutoAnalyzer and gas chromatography

was the case with the first design. Another advantage of the procedure described is that it enables the determination of total carbon and inorganic carbon in the range 10 to 50 mg/dm at a rate of 20 samples/h at a standard deviation of less than per cent. The described automated system is used very effectively in the authors laboratory for routine sample analysis. ACKNOWLEDGEMENTS This work will form part of a D.Sc. thesis in the Faculty of Mathematics and Pure Sciences at the University of Pretoria.