Van Dusschoten D, Tallarek U, Scheenen T, Neue U D, Van As H
Wageningen Nuclear Magnetic Resonance Centre (WNMRC), Wageningen Agricultural University, The Netherlands.
Magn Reson Imaging. 1998 Jun-Jul;16(5-6):703-6. doi: 10.1016/s0730-725x(98)00018-6.
Pulsed field gradient (PFG) multi-echo (ME) and turbo spin-echo (TSE) imaging is used to study dispersive flow in radially compressed chromatographic columns packed with porous silica beads. By using the pulsed field gradient turbo spin-echo sequence spatially resolved displacement imaging can be accelerated by a factor of 16. The positive effect of homogeneous radial packing on flow velocity and dispersion is demonstrated. Small heterogeneities of only a few percent are shown to cause changes of the dispersion coefficient of up to 50%.
脉冲场梯度（PFG）多回波（ME）和快速自旋回波（TSE）成像用于研究填充有多孔硅胶珠的径向压缩色谱柱中的分散流。通过使用脉冲场梯度快速自旋回波序列，空间分辨位移成像的速度可加快16倍。证明了均匀径向填充对流速和分散的积极影响。仅百分之几的小不均匀性就会导致分散系数变化高达50%。
