title: Liquid chromatography-mass spectrometry method for the analysis of 1,4-dimethylpyridinium in rat plasma--application to pharmacokinetic studies.
abstract: A sensitive and specific liquid chromatography electrospray ionization-mass spectrometry method for determination of 1,4-dimethylpyridinium (1,4-DMP) in rat plasma has been developed and validated. Chromatography was performed on an Aquasil C(18) analytical column (4.6 × 150 mm, 5 µm, Thermo Scientific, Rockford, IL, USA) with isocratic elution using a mobile phase containing acetonitrile and water with an addition of 0.1% of formic acid. Detection was achieved by an Applied Biosystems MDS Sciex (Concord, Ontario, Canada) API 2000 triple quadrupole mass spectrometer. Electrospray ionization was used for ion production. The limit of detection in the single ion monitoring mode was found to be 10 ng/mL. The limit of quantification was 50 ng/mL. The precision and accuracy for both within-day and between-day determination of 1,4-dimethylpyridinium was 2.4-7.56 and 90.93-111.48%. The results of this analytical method validation allow pharmacokinetic studies to be carried out in rats. The method was used for the pilot study of the pharmacokinetic behavior of 1,4-DMP in rats after intravenous administration.
authors.affiliation: Department of Pharmacokinetics and Physical Pharmacy, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, Krakow, Poland. mszafarz@cm-uj.krakow.pl
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Szafarz
authors.forename: Joanna
authors.initials: J
authors.lastname: Szymura-Oleksiak
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Zakrzewska
authors.forename: Maria
authors.initials: M
authors.lastname: Walczak
authors.forename: Kamil
authors.initials: K
authors.lastname: Kus
authors.forename: Anna
authors.initials: A
authors.lastname: Gonciarz
mesh_terms: D000818:Animals; D002853:Chromatography, Liquid / Q000379:methods*; D057230:Limit of Detection; D016014:Linear Models; D008297:Male; D011726:Pyridinium Compounds / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics; D051381:Rats; D017208:Rats, Wistar; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D011726:Pyridinium Compounds