Hydrogen Bonding in Alcoholic Beverages (Distilled Spirits) and Water−Ethanol Mixtures

Measurement of ethanol consumed in distilled spirits.

The amount of ethanol consumed in alcoholic beverages is often used as one indicator of alcohol's impact on health and society. An objective method of measuring the amount consumed in liquor can be derived in most years from the federal excise taxes and revenues that are levied on liquor according to proof or ethanol content. Similar measurement is not possible for wine and beer. Ethanol consum...

A Rapid and Sensitive Method for Dimethylsulphide Analysis in Brazilian Sugar Cane Sugar Spirits and Other Distilled Beverages

O acoplamento do extrator por “purge and trap” com a cromatografia gasosa foi utilizado para quantificar o dimetilssulfeto em bebidas alcoólicas. Muito boa performance foi obtida usando-se uma coluna HP-FFAP e um detector seletivo de massas operando em modo SIM (m/z 62): limite de detecção de 8 x 10 mol L; boa repetibilidade e tempo total de análise de 25 minutos. O método foi aplicado em 60 am...

Hydrogen Bonding in Binary Mixtures of Tetrahydrofuran and Water

This contribution reports on the wavenumber shifts and linewidth changes observed for the Raman bands of the C-O and C-C stretching vibrations of tetrahydrofuran (THF) in a series of binary mixtures with water. Experimental results are compared with ab-initio calculations on THF and hydrogen-bonded THF-water complexes. The Raman spectroscopic analysis of vibrational relaxation processes such as...

Alcoholic Beverages in India

Hydrogen bonding and the cryoprotective properties of glycerol/water mixtures.

Molecular dynamics simulations and infrared spectroscopy were used to determine the hydrogen bond patterns of glycerol and its mixtures with water. The ability of glycerol/water mixtures to inhibit ice crystallization is linked to the concentration of glycerol and the hydrogen bonding patterns formed by these solutions. At low glycerol concentrations, sufficient amounts of bulk-like water exist...