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Two-Dimensional Separation System by Coupling Capillary Isoelectric Focusing to Pressurized Capillary Electrochro-matography for Peptides Separation
Author(s): 
Pages: 188-192
Year: Issue:  2
Journal: Chinese Journal of Analytical Chemistry

Keyword:  毛细管等电聚焦 加压毛细管电色谱 多维分析 多肽;
Abstract: 以毛细管等电聚焦(cIEF)为第一维分离模式,以反相加压毛细管电色谱(pCEC)为第二维分离模式,开展离线二维色谱分离研究,并对复杂肽段进行分离。羟丙基纤维素(HPC)涂层的毛细管用于cIEF分离,对6种标准蛋白质的平均分离柱效约为31万。在毛细管末端引进电隔离槽,方便了第一维样品的收集。在加电6 kV下,第二维pCEC对多肽的分离比不加电时的分辨率和分离速度提高。实验中用牛血清白蛋白的酶解肽段对cIEF/pCEC二维体系进行考察,理论峰容量约为30000。将该平台用于人血红细胞破碎液酶解多肽的分离,7个片段共检测到约200个峰。结果表明,cIEF/pCEC二维能较好地完成对复杂多肽的分离。
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