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Heart-cuts liquid chromatography

Rudaz, S., S. Souverain, C. Schelling et al. 2003. Development and validation of a heart-cutting liquid chromatography-mass spectrometry method for the determination of process-related substances in cetirizine tablets. Anal. Chim. Acta. 492 271-282. [Pg.140]

Figure 2.7 Purification of a mixture of anthracycline antibiotics using heart cut recycle liquid chromatography to yield the most active fraction. Conditions column, JAIGEL-310 eluent, chloroform-methanol-25% NH4OH (200 5 1) flow rate, 4 ml min-1 detection refractivity index. Figure 2.7 Purification of a mixture of anthracycline antibiotics using heart cut recycle liquid chromatography to yield the most active fraction. Conditions column, JAIGEL-310 eluent, chloroform-methanol-25% NH4OH (200 5 1) flow rate, 4 ml min-1 detection refractivity index.
Enantiomers, separation of see chiral forms End-cuts see heart-cuts Enhanced fluidity liquid chromatography (EFLC) 156, 157... [Pg.445]

Naphthalene, obtained from a petroleum reformate, was chromato-graphically pure after recrystallization. The two monomethylnaph-thalenes were obtained by distillation from the same reformate. The 1-methylnaphthalene was a heart cut of 99-f% purity from a precise fractional distillation. 2-Methylnaphthalene from the same distillation was recrystallized to high purity. 1,3-Dimethylnaphthalene, 1,7-dimethylnaphthalene, and 1,8-dimethylnaphthalene were synthetic samples that were kindly donated by Dr. G. D. Johnson of Kansas State University and Dr. L. Friedman of Case Institute. The remaining isomers were obtained from commercial sources. They were treated with Raney nickel in methanol under reflux to destroy catalyst poisons such as sulfur compounds. The liquid isomers were further purified by preparative-scale gas chromatography. Octalins were prepared by reducing pure naphthalene with lithium in ethylamine (29). [Pg.20]

Oda, Y. Asakawa, N. Kajima, T. Yoshida, Y Sato, T. Coliunn-switching hi -performance liquid chromatography for on-line simultaneous determination and resolution of enantiomers of verapamil and its metabolites in plasma. Pharm.Res., 1991, 8, 997-1001 Chu, Y.-Q. Wainer, I.W. Determination of the enantiomers of verapamil and norverapamil in serum using coupled achiral-chiral higdi-performance liquid chromatography. J.Chromatogr., 19, 497, 191-200 [plasma chiral coliunn-switching heart-cut LOQ 25 ng/mL]... [Pg.1465]

See other pages where Heart-cuts liquid chromatography is mentioned: [Pg.849]    [Pg.233]    [Pg.5]    [Pg.94]    [Pg.320]    [Pg.487]    [Pg.102]    [Pg.210]    [Pg.233]    [Pg.186]    [Pg.1465]    [Pg.675]    [Pg.677]    [Pg.678]    [Pg.137]    [Pg.894]    [Pg.1041]    [Pg.72]   


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