Microfluidic microchip with integrated substance injection
    10.
    发明授权
    Microfluidic microchip with integrated substance injection 失效
    集成物质注射的微流控微芯片

    公开(公告)号:US06495016B1

    公开(公告)日:2002-12-17

    申请号:US09532157

    申请日:2000-03-21

    申请人: Bernd Nawracala

    发明人: Bernd Nawracala

    IPC分类号: C02F140

    摘要: A microfluidic microchip includes a channel structure having a delivery channel connected in a substance conductive manner to a separation channel. Laterally offset discharge channels are at connection points displaced from a connection point between the delivery and separation channels. Between the connection points on the one hand and the connection point on the other are channel sections having concordant channel lengths. By imposing suitable electrical potentials along these channel sections, the filling volumes present in the channel sections are satisfactorily homogenous after a certain period of time to form a representative part of a substance specimen. Substance volume units are formed in these channel sections. The lengths of the volume units are determined exclusively by the lengths of the channel sections. Pulse-shaped substance volume sequences are injected into the separation channel. The signal-to-noise ratio of the measurement results is substantially improved by generating substance volume sequences on the basis of pseudo-randomly scattered binary digit sequences similar to Hadamard sequences, and by a cross-correlation analysis of spectra measured on the basis of such substance volume sequences.

    摘要翻译: 微流体微芯片包括具有以物质导电方式连接到分离通道的输送通道的通道结构。 在从输送和分离通道之间的连接点移位的连接点处的横向偏移排出通道。 一方面的连接点和另一方的连接点是具有一致的通道长度的通道部分。 通过沿着这些通道部分施加合适的电势,存在于通道部分中的填充体积在一段时间之后令人满意地均匀,以形成物质样品的代表性部分。 在这些通道部分中形成物质体积单位。 体积单位的长度仅由通道段的长度确定。 将脉冲物质体积序列注入分离通道。 通过基于类似于Hadamard序列的伪随机分散的二进制数字序列产生物质体积序列,并且通过基于这样的方法测量的光谱的互相关分析,实质上改善了测量结果的信噪比 物质体积序列。