METHOD FOR ELECTROPHORETICALLY DETERMINE THE COMPOSITION OF MULTICOMPONENT SOLUTIONS AND A DEVICE FOR CARRYING OUT SAID METHOD
申请人:Zinchenko, Mikhail Ivanovich
公开号:EP1998170A1
公开(公告)日:2008-12-03
The present invention relates to analytical chemistry, more particularly, to methods of electrophoretic analysis, and can be utilized to analysis of multicomponent solutions.
The invention is aimed at elimination of effect of uncontrolled scatter of electroosmotic flow rates on reproducibility of electrophoretic separation.
The method is claimed of electrophoretic separation of multicomponent solutions, including capillary washing with electrolytic solution, injection of sample into capillary, electrophoretic separation of sample components in capillary effected by voltage applied between the capillary ends, detection and measurement of retention times of separated sample components, wherein during capillary washing by electrolytic solution the streaming potential magnitude being determined by measuring potential difference between capillary ends at definite pressure difference between said capillary ends, and identification of sample components is made subject to the measured streaming potential magnitude and values of measured retention times of sample components.
The device is claimed comprising of vials for electrolyte and samples, capillary, means for installation of capillary made for putting capillary ends to the mentioned vials for electrolyte and samples, means for generation of electrolyte flow through capillary, pneumatically connected with means for installation of capillary, means for applying voltage between capillary ends, detector connected with capillary, system of signal management and processing, as well as means for streaming potential measurement, providing closing of electric measurement circuit in process of washing, including electrolyte in vials and capillary, and to open it in process of electrophoretic separation.
Reproducibility is increased sufficiently and productivity of analysis is increased in process of electrophoretic analysis of multicomponent solutions. 6 Figs.
本发明涉及
分析化学,特别是电泳分析方法,可用于分析多组分溶液。
本发明旨在消除不受控制的电渗流率散射对电泳分离重现性的影响。
该方法用于多组分溶液的电泳分离,包括用电解溶液洗涤毛细管、将样品注入毛细管、通过在毛细管两端施加电压实现毛细管中样品组分的电泳分离、检测和测量分离样品组分的保留时间、其中,在用电解溶液清洗毛细管的过程中,通过测量毛细管两端之间的电位差来确定所述毛细管两端之间的确定压差下的流电位大小,并根据测得的流电位大小和测得的样品组分的保留时间值来识别样品组分。
该装置包括电解液和样品瓶、毛细管、毛细管安装装置(用于将毛细管末端安装到上述电解液和样品瓶上)、电解液流经毛细管的装置(与毛细管安装装置气动连接)、在毛细管两端之间施加电压的装置,与毛细管相连的检测器,信号管理和处理系统,以及流电势测量装置,在清洗过程中关闭电测量电路,将电解液注入样品瓶和毛细管,并在电泳分离过程中打开电测量电路。
在对多组分溶液进行电泳分析时,可充分提高可重复性,并提高分析效率。6 图