Ion exchange resins were studied on different length scales by magnetic resonance imaging (MRI) with the focus on their interactions with nanoparticles (NP) and molecular clusters. On the length scale of resin beds (bed diameters <20 mm), the behavior of NP and of molecular clusters was shown to depend on the kind of ion exchange resin and nanoscale moiety. The kinetics of absorption and penetration into the resin beads was quantified on a smaller length scale of a stack of resin beads (sample with an outer diameter of 1.7 mm). Finally, using an MRI μ‐coil (3D spatial resolution ≥8 μm), adsorption of superparamagnetic NP on individual resin beads was observed via the magnetic field disturbance characteristic for magnetic dipoles. As a result, this allows the detection of NP (diameter ≤100 nm) by MRI on much larger length scales of several micrometers.

中文翻译：

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不同长度尺度的离子交换填料的 MRI


通过磁共振成像 （MRI） 在不同长度尺度上研究离子交换树脂，重点是它们与纳米颗粒 （NP） 和分子簇的相互作用。在树脂床的长度尺度（床直径 <20 mm）上，NP 和分子簇的行为表明取决于离子交换树脂的种类和纳米级部分。在一堆树脂珠（外径为 1.7 mm 的样品）的较小长度尺度上定量吸收和渗透到树脂珠中的动力学。最后，使用 MRI μ线圈 （3D 空间分辨率 ≥8 μm），通过磁偶极子的磁场干扰特性观察超顺磁性 NP 在单个树脂珠上的吸附。因此，这允许通过 MRI 在几微米的更大长度尺度上检测 NP（直径 ≤100 nm）。