Quantification of higher alcohols and ethyl acetate in wine using liquid extraction and GC-2030 with FID

Introduction

The taste and aroma of wines can cohere to the amount of different alcohols and solvents like methanol, butanol and ethyl acetate. Therefore winemakers are interested in a quantification of these substances. Controlling fermentations for better taste, and even more importantly for decreasing health damages by other alcohol than drinking alcohol, is a main concern. Determining these compounds in the newest Shimadzu wine „Science Selection – Graubur- gunder Spätlese“ with the gas chromatograph GC-2030 and a flame ionisation detector (FID) is a fast and efficient way to measure the amount of ethyl acetate, isoamyl alcohol, n-propanol, isobutanol and even methanol without need for headspace usage. A second brand of wine, dry red wine, was also tested and compared with the Shimadzu white wine. The sample preparation was done by liquid extraction with organic solvent in a milliliter scale. 2-Butanol as an internal standard (ISTD) and response factors are used for calibration.

October 10, 2019 GMT