کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4907452 | 1426206 | 2017 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Vapor pressures and vaporization enthalpy of (â) α-bisabolol and (dl) menthol by correlation gas chromatography
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Vapor pressures and vaporization enthalpy of (â) α-bisabolol and (dl) menthol by correlation gas chromatography Vapor pressures and vaporization enthalpy of (â) α-bisabolol and (dl) menthol by correlation gas chromatography](/preview/png/4907452.png)
چکیده انگلیسی
The vapor pressures and vaporization enthalpies of (â) α-bisabolol and (dl)-menthol, two GRAS chemicals (generally recognized as safe) are evaluated by correlation gas chromatography using a series of saturated primary alcohols as standards. Vaporization enthalpies of (96.6 ± 2.4) and (74.2 ± 2.8) kJ molâ1 and vapor pressures of p/Pa = (0.020 ± 0.003) and (4.5 ± 0.44) were evaluated at T = 298.15 K for (â) α-bisabolol and (dl)-menthol, respectively, and compared to literature values. The vapor pressures of both compounds from T = (298.15 to 500) K have been derived from correlations using vapor pressures of a series of 1-alkanols and corresponding gas chromatographic retention times at 10 K intervals. The results were fit to a second order polynomial. Calculated normal boiling temperatures of TB = (574.8 and 492.7) K are calculated for (â) α-bisabolol and (dl)-menthol, respectively. A normal boiling temperature of TB = (485.2, and 489.7) K has previously been reported for (dl)-menthol. Vapor pressures for both (l)-menthol and (dl)-menthol from a previous study and (dl)-menthol from this study are compared with literature values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 107, April 2017, Pages 18-25
Journal: The Journal of Chemical Thermodynamics - Volume 107, April 2017, Pages 18-25
نویسندگان
Leasa Keating, Harold H. Harris, James S. Chickos,