High-performance liquid magneto-chromatography.
High-performance liquid magneto-chromatography (HPLMC) is a new chromatography technique with two distinctive features: (a) a high surface area stationary phase with paramagnetic properties composed of magnetite embedded in a silica gel, and (b) a magnetic field (variable intensity 0-5.5 mT) that selectively retains paramagnetic substances in the stationary phase depending on their magnetic susceptibility. The system can also be used to separate diamagnetic compounds such as biologically active organic molecules, but these first need to be complexed with Fe and Cu compounds to render them paramagnetic. Herein, we describe the experimental setup and the relationship between the retention factor and the magnetic field intensity, i.e., the force interaction of the complexes in relation to the magnetized magnetite. The expression derived also provides the effective magnetic susceptibility (Deltachi) of the components separated.
Barrado
E
E
Departamento de Química Analítica, Facultad de Ciencias, Universidad de Valladolid, Paseo Prado de la Magdalena s/n, 47005 Valladolid, Spain. ebarrado@qa.uva.es
Rodríguez
J A
JA
D000596:Amino Acids / Q000032:analysis / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D003300:Copper / Q000737:chemistry; D052203:Ferrosoferric Oxide / Q000737:chemistry; D008280:Magnetics; D058428:Silica Gel; D012822:Silicon Dioxide / Q000737:chemistry
D000596:Amino Acids; D058428:Silica Gel; D012822:Silicon Dioxide; D003300:Copper; D052203:Ferrosoferric Oxide