کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1206991 965252 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microwave-assisted derivatization of acidic herbicides for gas chromatography–mass spectrometry
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Microwave-assisted derivatization of acidic herbicides for gas chromatography–mass spectrometry
چکیده انگلیسی

Microwave radiation is used to speed up chemical derivatization. In the present study, three microwave-assisted techniques for the methylation of chlorophenoxy acid herbicides prior to analysis by gas chromatography coupled with mass spectrometry are compared. Derivatization was performed with the catalysts sulphuric acid and boron trifluoride as well as with trimethylsilyldiazomethane. In order to establish optimized and stable conditions, a screening for statistically significant factors by means of experimental designs was carried out and supplemented by a careful optimization. Special emphasis has been given to an accurate validation to prove the performance of the techniques. Furthermore, all microwave-assisted methods were compared with their conventional analogues. The optimized methods are valid for routine analysis of different matrices such as water, soil, sediment or tissues, especially for high sample throughput since a simultaneous derivatization of up to 64 samples in one run is possible.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1192, Issue 2, 30 May 2008, Pages 282–288
نویسندگان
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