Determination of the aza alkyl lysophospholipid 3-methoxy-2-N,N-methyloctadecylaminopropyloxyphosphorylcholine in rat plasma by liquid chromatography-particle beam-mass spectrometry.
A sensitive and specific method for the determination of the aza alkyl lysophospholipid (AALP) 3-methoxy-2-N,N-methyloctadecylaminopropyloxyphosphorylcholine (I) in rat plasma is described. The target molecule was analyzed by high-performance liquid chromatography (HPLC)-mass spectrometry (MS) after one single liquid-liquid extraction with chloroform-methanol (2:1, v/v). 1,2-Didecanoyl-sn-glycero-3-phosphocholine was used as internal standard. HPLC was carried out using a polymeric reversed-phase column; the coupling to the mass spectrometer was a particle beam (PB) interface, and the ionization method was electron impact (EI). This simple and rugged method permits the measurement of I in rat plasma in the range of 25 ng/ml-5 micrograms/ml with good accuracy and precision and is used in pharmacokinetic studies.
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Mass Spectrometry Department, S.A. LASA Laboratorios, Barcelona, Spain.
D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D007202:Indicators and Reagents; D007275:Injections, Intravenous; D008246:Lysophospholipids / Q000008:administration & dosage / Q000097:blood*; D013058:Mass Spectrometry; D051381:Rats
D007202:Indicators and Reagents; D008246:Lysophospholipids; C072522:BN 52205