Method and device employing time-delayed integration for detecting
sample components after separation
    2.
    发明授权
    Method and device employing time-delayed integration for detecting sample components after separation 失效
    方法和装置采用时间延迟积分检测分离后的样品成分

    公开(公告)号:US5141609A

    公开(公告)日:1992-08-25

    申请号:US614830

    申请日:1990-11-16

    摘要: This invention relates to a detection method and apparatus useful in capillary electrophoresis and capillary chromatography that employs an array of solid state detector such as a charge-coupled device operating in the time-delayed integration mode which allows more exposure time of the moving analyte zones. The CCD is synchronized so that after a normal exposure of the CCD, the charge information in every row of the CCD is shifted toward one end of the CCD and the charge/signal information in the last row is quantified. Applying the CCD and the time-delayed integration method in effect increases the effective sampling volume of the flow cell without introducing band broadening. Use of the CCD as a fluorescence detection in capillary electrophoresis separations allows analytes to be differentiated both in migration time and fluorescence emission, yielding detection limits for fluorophores in the 1-8.times.10.sup.-20 mole range.

    摘要翻译: 本发明涉及一种用于毛细管电泳和毛细管色谱法的检测方法和装置,其采用固态检测器阵列,例如以时间延迟积分模式工作的电荷耦合器件,其允许移动的分析物区域的更多的暴露时间。 CCD被同步,使得在CCD的正常曝光之后,CCD的每行中的电荷信息向CCD的一端移动,并且对最后一行的充电/信号信息进行量化。 应用CCD和时间延迟积分法有效地增加了流动池的有效采样体积,而不引入带宽。 在毛细管电泳分离中使用CCD作为荧光检测可以使分析物在迁移时间和荧光发射中均有区别,从而产生1-8x10-20摩尔范围的荧光团的检测限。