کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7689781 | 1495901 | 2014 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The impact of pressure and frictional heating on retention, selectivity and efficiency in ultra-high-pressure liquid chromatography
ترجمه فارسی عنوان
تأثیر فشار و گرمای اصطکاکی بر ذخیره، انتخابی و کارایی در کروماتوگرافی مایع با فشار بالا
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
The effects of pressure and frictional heating deserve serious consideration in ultra-high-pressure liquid chromatography (UHPLC) separations, as the pressures used can be three times greater than those in conventional high-performance LC (HPLC). We show that the effects of pressure alone can give useful selectivity effects, especially when separating molecules of different size. Frictional heating effects can cause serious losses in column efficiency and may also give changes in the selectivity of the separation. Nevertheless, the detrimental effect of frictional heating can be reduced, for instance by the judicious selection of column thermostat and particle type. In practical situations, pressure and heating effects occur simultaneously and can cause problems in transferring methods from conventional HPLC to UHPLC. In reversed-phase separations, the typical effect of increased retention with increasing pressure is counteracted by the reduction in retention that usually occurs at elevated temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: TrAC Trends in Analytical Chemistry - Volume 63, December 2014, Pages 31-43
Journal: TrAC Trends in Analytical Chemistry - Volume 63, December 2014, Pages 31-43
نویسندگان
David V. McCalley,