کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1171993 960739 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A membraneless gas diffusion unit: Design and its application to determination of ethanol in liquors by spectrophotometric flow injection
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A membraneless gas diffusion unit: Design and its application to determination of ethanol in liquors by spectrophotometric flow injection
چکیده انگلیسی

This work presents new design of a gas diffusion unit, called ‘membraneless gas diffusion (MGD) unit’, which, unlike a conventional gas diffusion (GD) unit, allows selective detection of volatile compounds to be made without the need of a hydrophobic membrane. A flow injection method was developed employing the MGD unit to determine ethanol in alcoholic drinks based on the reduction of dichromate by ethanol vapor. Results clearly demonstrated that the MGD unit was suitable for determination of ethanol in beer, wine and distilled liquors. Detection limit (3S/N) of MGD unit was lower than the GD unit (GD: 0.68%, v/v; MGD: 0.27%, v/v). The MGD design makes the system more sensitive as mass transfer is more efficient than that of GD and thus, MGD can perfectly replace membrane-based designs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 579, Issue 1, 2 October 2006, Pages 33–37
نویسندگان
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