105-21-5, Name is Gamma-heptalactone, belongs to tetrahydrofurans compound, is a common compound. Product Details of 105-21-5In an article, once mentioned the new application about 105-21-5.
Identification of aroma compounds in chinese “moutai” and “langjiu” liquors by normal phase liquid chromatography fractionation followed by gas chromatography/olfactometry
The aroma-active compounds in two famous Chinese soy sauce aroma type liquors, Moutai and Langjiu liquors, were investigated in this study. The aroma compounds were isolated using liquid/liquid extraction, and further fractionated into acidic, basic, and neutral fractions. The neural fraction was applied to a normal phase liquid chromatography column and further separated based on their polarity. The aroma compounds of seven fractionations were separately analyzed by GC/Olfactometry (GC/O). A total of 186 aroma-active compounds were identified by GC/O and GC/MS. Among these compounds, ethyl hexanoate, hexanoic acid, 3-methylbutanoic acid, 3-methylbutanol, 2,3,5,6-tetramethylpyrazine, ethyl 2- phenylacetate, 2-phenylethyl acetate, ethyl 3-phenylpropanoate, 4-methylguaiacol, and gamma-decalactone had the highest aroma intensity. Several other basic compounds, including 2,3-dimethyl-5-ethylpyrazine, 2,3,5-trimethyl-6-ethylpyrazine, 2,3,5-trimethylpyrazine, were identified to have high aroma indentify. In addition, vanillin, gamma-heptalactone, gamma-nonalactone, Z-whisky lactone, furaneol, and sotolon, were identified in the liquors. Geosmin was also detected in these two liquors.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem