کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9749176 1493803 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Orthogonality considerations in comprehensive two-dimensional gas chromatography
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Orthogonality considerations in comprehensive two-dimensional gas chromatography
چکیده انگلیسی
This study explores separation orthogonality with respect to comprehensive two-dimensional gas chromatography (GC × GC) for a range of different column polarities in the first dimension (1D), with two second dimension (2D) column types. Systematic variation in the net polarity of the first dimension allows the effect of column phase relative polarity on analyte retention in both the first and second dimensions to be evaluated. First dimension polarity manipulation significantly affects elution temperature (Te) of the analytes. This alters the magnitude of retention on the second dimension, and the extent of utility of separation space. By use of retention factor/temperature data in single column experiments, along with 1D Te data, retention on the 2D column can be estimated. This allows the two-dimensional separation to be predicted, and compared with experimental data. Predicted GC × GC peak positions corresponded favourably with the experimentally derived chromatograms, yielding a simple approach for predicting two-dimensional separations, using unique column set combinations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1071, Issues 1–2, 15 April 2005, Pages 47-53
نویسندگان
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