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Metal-organic framework MIL-53(Al) was explored as the stationary phase for high-performance liquid chromatographic separation of position isomers using a binary and/or polar mobile phase. Baseline separations of xylene, dichlorobenzene, chlorotoluene and nitrophenol isomers were achieved on the slurry-packed MIL-53(Al) column with high resolution and good precision. The effects of mobile phase composition, injected sample mass and temperature were investigated. The separation of xylene, dichlorobenzene, chlorotoluene and nitrophenol isomers on MIL-53(Al) were controlled by entropy change.

Metal-organic framework MIL-53(Al) is explored for reverse-phase high-performance liquid chromatographic separation of a wide range of analytes from non-polar to polar, and acidic to basic solutes with high resolution, good selectivity, stability and reproducibility.

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