title: Determination of 4-dimethylaminophenol concentrations in dog blood using LC-ESI/MS/MS combined with precolumn derivatization.
abstract: A sensitive and reproducible LC-ESI/MS/MS method, which was combined with the precolumn dansyl chloride derivatization to enhance the signal intensity of analytes, was developed to determine blood 4-dimethylaminophenol (DMAP) concentrations. The linearity of the method was observed within the concentration range of 2-2000 ng/mL. The precision, accuracy, stability, recovery and matrix effect of the method were also investigated and found to meet the requirements for pharmacokinetic studies of the drug. By using this method, pharmacokinetic studies were conducted in dogs after i.m. and i.v. administrations. The results showed that DMAP could not only be absorbed into blood quickly after i.m., but also can be eliminated rapidly. Both i.m. and i.v. routes are appropriate for DMAP to be used in field first-aid. It has been proved that this LC-MS/MS combined with precolumn derivatization method can be used as a routine analytical method to provide enhanced measurements for blood DMAP concentrations. It is also useful for DMAP pharmacokinetic evaluation.
authors.affiliation: Key Lab of Drug Metabolism & Pharmacokinetics, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing, PR China. xiaomeizhuang@tom.com
authors.forename: Xiao Mei
authors.initials: XM
authors.lastname: Zhuang
authors.forename: Mei
authors.initials: M
authors.lastname: Yuan
authors.forename: Zhi Wei
authors.initials: ZW
authors.lastname: Zhang
authors.forename: Xiao Ying
authors.initials: XY
authors.lastname: Wang
authors.forename: Zhen Qing
authors.initials: ZQ
authors.lastname: Zhang
authors.forename: Jin Xiu
authors.initials: JX
authors.lastname: Ruan
mesh_terms: D000627:Aminophenols / Q000097:blood* / Q000493:pharmacokinetics; D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004285:Dogs; D004355:Drug Stability; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D000627:Aminophenols; C020292:4-dimethylaminophenol