کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1202757 1493558 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessment of dispersive liquid–liquid microextraction conditions for gas chromatography time-of-flight mass spectrometry identification of organic compounds in honey
ترجمه فارسی عنوان
ارزیابی شرایط مایکاکساکتیو مایع پراکنده برای کروماتوگرافی گازی طیف سنجی جریان پرواز از طریق شناسایی ترکیبات آلی در عسل
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Dispersive liquid–liquid microextraction of honey.
• Effective concentration of volatile and semi-volatile honey organic compounds.
• Enhanced extraction efficiency versus headspace solid-phase microextraction.
• Selective detection of target compounds using narrow mass extraction windows.

The suitability of the dispersive liquid–liquid microextraction (DLLME) technique for gas chromatography (GC) characterization of minor organic compounds in honey samples is evaluated. Under optimized conditions, samples were pre-treated by liquid–liquid extraction with acetonitrile followed by DLLME using carbon tetrachloride (CCl4, 0.075 mL) as extractant. The yielded settled phase was analyzed by GC using high resolution time-of-flight (TOF) mass spectrometry (MS). The whole sample preparation process is completed in approximately 10 min, with a total consumption of organic solvents below 4 mL, relative standard deviations lower than 12% and with more than 70 organic compounds, displaying linear retention index in the range from 990 to 2900, identified in the obtained extracts. In comparison with HS SPME extraction, higher peak intensities were attained for most volatile and semi-volatile compounds amenable to both extraction techniques. Furthermore, other species such as highly polar and water soluble benzene acids, long chain fatty acids, esters and flavonoids, which are difficult to concentrate by HS SPME, could be identified in DLLME extracts. Some of the compounds identified in DLLME extracts have been proposed as useful for samples classification and/or they are recognized as markers of honeys from certain geographic areas.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1368, 14 November 2014, Pages 26–36
نویسندگان
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