کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1206996 965252 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sample stacking and sweeping in microemulsion electrokinetic chromatography under pH-suppressed electroosmotic flow
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Sample stacking and sweeping in microemulsion electrokinetic chromatography under pH-suppressed electroosmotic flow
چکیده انگلیسی

Two on-line sample concentration techniques, sample stacking and sweeping under pH-suppressed electroosmotic flow, were evaluated in microemulsion electrokinetic chromatography. The concept of stacking with anion selective electrokinetic injection and a water plug in a reverse-migrating microemulsion (SASIW-RMME) was brought forward in this article. Six flavonoids were concentrated using a microemulsion consisting of 80 mM sodium dodecyl sulfate, 1.2% (v/v) ethyl acetate, 0.6% (v/v) 1-butanol, 10% acetonitrile (v/v) and 50 mM phosphoric acid (pH* 1.8). Significant detector response improvements were achieved. The limits of detection were in the low ng/ml level. Finally, the sample of Fructus aurantii Immaturus was analyzed using sweeping technique.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1192, Issue 2, 30 May 2008, Pages 319–322
نویسندگان
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