کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1245196 969714 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Indirect thermal lens detection for capillary electrophoresis
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Indirect thermal lens detection for capillary electrophoresis
چکیده انگلیسی

Thermal lens detection with a 325.0 nm He–Cd excitation laser is used for thermooptical indirect detection in combination with the capillary electrophoretic separation of organic anions. The optimization of indirect thermooptical detection is discussed. With Mordant Yellow 7 (an azo dye) chosen as a probe ion limits of detection for 1-heptane-, 1-pentane-, 1-butane-, 1-propanesulfonic, and acetic acid at a level of n × 10−7 M were achieved with a separation electrolyte containing 50 μM of the probe ion and 5 mM Tris pH 9.90. A further increase in the detection sensitivity (twofold decrease in the limit of detection ) was obtained with a separation electrolyte containing a volume fraction of 20% acetonitrile.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 71, Issue 4, 15 March 2007, Pages 1788–1794
نویسندگان
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