[A simple method to produce defined standard gas samples of volatile anaesthetics (author's transl)].

A simple procedure enabling defined (standard) gas concentrations of volatile anaesthetics to be prepared for gas chromatographic analyses in a short time is described. Results obtained with this technique, showing excellent reproducibility (coefficients of variation: 1 per cent or less), are presented. Sources of error inherent in the method theoretically (dilution effect of repeated sampling; not taking into account nonideality of gas mixtures) are discussed, these errors, as easily may be proven, being within the limits of accuracy of the analytical method.