DIN EN 15721

Abstract

This European Standard specifies a gas chromatographic method for ethanol, in which higher alcohols (propan-1-ol, butan-1-ol, butan-2-ol, 2-methylpropan-1-ol (isobutanol), 2-methylbutan-1-ol, and 3-methylbutan-1-ol) from 0,1 % up to 2,5 % (<em>m/m</em>), methanol from 0,1 % up to 3 % (<em>m/m</em>) and other impurities, in the range from 0,1 % up to 2 % (<em>m/m</em>) are determined. <br>Impurities are all the compounds not attributed to the groups of higher alcohols or methanol. <br>NOTE 1 The European ethanol blending component specification[1] sets a limit for the combined result of ethanol + higher alcohols, not the ethanol content itself. <br>Due to possible interferences, the method is not applicable to denatured ethanol samples. <br>Water, if present in the sample, is not included in this analysis, because a signal for water is not visible in the chromatogram. Therefore, if "alcohol content" is called up in a specification, water needs to be considered separately in the calculations. <br>NOTE 2 For the purposes of this European Standard, the term "% (<em>m/m</em>)" is used to represent the mass fraction (<em>&#969;</em>).