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Autor:
Hiromitsu Yokota, Akiko Okada, Shigeo Okubo, Kazuhiko Nakahara, Fumiko Mashige, Yoshikazu Matsushima, Hideko Kanazawa
Publikováno v:
Journal of Chromatography A. 949:1-9
Omeprazole is a benzimidazole compound that acts as a proton-pump inhibitor. Because the metabolism of omeprazole is mainly catalyzed by cytochrome P-450 (CYP) 3A4 and CYP2C19. the genetic polymorphism of CYP2C19 could be of clinical concern in the t
Publikováno v:
Journal of Chromatography A. 912:369-373
Polymyxin B is a peptide antibiotic complex present as sulphate. The components were separated preparatively on a poly(styrene-divinylbenzene) (PLRP-S), 1000 A, 8 microm, 250 x 12.5 mm I.D. stationary phase maintained at 60 degrees C and using 215 nm
Publikováno v:
Journal of Chromatography A. 914:53-58
Until now no liquid chromatography (LC) method is described to determine the purity and content of troleandomycin and its related substances. A simple, robust, sensitive and selective isocratic liquid chromatographic method suitable for the determina
Publikováno v:
Journal of Chromatography A. 910:285-290
The liquid chromatographic separation of seven macrolides used in food producing animals in the European Union has been studied. Separation was performed by using an end-capped high-purity silica-based C18 column and mobile phases consisting of phosp
Autor:
Maria J. López de Alda, Damià Barceló
Publikováno v:
Journal of Chromatography A. 911:203-210
In this study, a procedure for the simultaneous determination in water of six estrogens (estradiol, estriol, estrone, ethynyl estradiol, mestranol, and diethylstilbestrol) and three progestogens (progesterone, norethindrone, and levonorgestrel), sele
Publikováno v:
Journal of Chromatography A. 886:31-46
An optimisation protocol is presented for the resolution of complex mixtures in isocratic RPLC with binary mobile phases of organic solvent and water, which is based on the prediction of peak position and shape of the individual compounds. A good des
Autor:
Hiroyuki Nakazawa, Masakazu Horie
Publikováno v:
Journal of Chromatography A. 882:53-62
A sensitive and selective method using liquid chromatography (LC)-electrospray mass spectrometry for the determination of growth promoters, trenbolone and zeranol, in bovine muscle and liver has been developed. The LC separation was performed on a Zo
Publikováno v:
Journal of Chromatography A. 882:89-98
A multi-residue liquid chromatography-mass spectrometry (LC-MS) assay method is described for the determination of four nitroimidazoles in poultry muscle. The extraction procedure is based on liquid-liquid extraction with ethyl acetate followed by an
Publikováno v:
Journal of Chromatography A. 870:169-177
A liquid chromatography method is described to determine sulfaquinoxaline (SQX), sulfamethazine (SMT), and pyrimethamine (PMT), by using a Kromasil C18 column and a 40 mM NaH2PO4 buffer solution, containing 10 mM NaClO4 (pH 3.0)–acetonitrile (65:35
Publikováno v:
Journal of Chromatography A. 870:237-243
A reversed-phase liquid chromatography method for analysis of polymyxin B sulphate is described. The method uses a YMC-Pack Pro, C18, 5 microm, 250x4.6 mm I.D. column maintained at 30 degrees C. The mobile phase comprises acetonitrile-sodium sulphate