Implications of column peak capacity on the separation of complex peptide mixtures in single- and two-dimensional high-performance liquid chromatography

被引:146
作者
Gilar, M [1 ]
Daly, AE [1 ]
Kele, M [1 ]
Neue, UD [1 ]
Gebler, JC [1 ]
机构
[1] Waters Corp, Life Sci Chem R&D, Milford, MA 01757 USA
关键词
high-performance liquid chromatography; column peak capacity; two-dimensional (2D); proteomic;
D O I
10.1016/j.chroma.2004.10.092
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Column peak capacity was utilized as a measure of column efficiency for gradient elution conditions. Peak capacity was evaluated experimentally for reversed-phase (R-P) and cation-exchange high-performance liquid chromatography (HPLC) columns, and compared to the values predicted from RP-HPLC gradient theory. The model was found to be useful for the prediction of peak capacity and productivity in single- and two-dimensional (2D) chromatography. Both theoretical prediction and experimental data suggest that the number of peaks separated in HPLC reaches an upper limit, despite using highly efficient columns or very shallow gradients. The practical peak capacity value is about several hundred for state-of-the-art RP-HPLC columns. Doubling the column length (efficiency) improves the. peak capacity by only 40%, and proportionally increases both the separation time and the backpressure. Similarly, extremely shallow, gradients have a positive effect on the peak capacity, but analysis becomes unacceptably long. The model predicts that a 2D-HPLC peak capacity of 15,000 can be achieved in 8 h using multiple fraction collection in the first dimension followed by fast RP-HPLC gradients employing short, but efficient columns in the second dimension. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:183 / 192
页数:10
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