title: The determination of lysergide (LSD) in urine by high-performance liquid chromatography-isotope dilution mass spectrometry (IDMS).
abstract: The use of isotope dilution mass spectrometry (IDMS) has been investigated for the forensic confirmation of lysergic acid diethylamide (LSD) in urine by LC-MS. The advantages of using a deuterated analog of LSD as an internal standard over methysergide are discussed. This study includes a comparison of the electrospray mass spectra of LSD, LSD-d3 and methysergide, and discusses the choice of suitable ions for use in selected ion monitoring (SIM) mode. An IDMS method is presented for the LC-MS confirmation of LSD in urine, with a limit of quantification (LOQ) of 0.5 ng/mL, reflecting the forensic requirement at this laboratory. Under some circumstances the LOQ can be improved to 0.1 ng/mL. This method is linear in the range tested (up to 10 ng/mL LSD in urine) and has been validated in terms of accuracy and precision.
authors: Laboratory of the Government Chemist, Teddington, Middlesex, England.
authors: S A
authors: SA
authors: White
authors: A S
authors: AS
authors: Kidd
authors: K S
authors: KS
authors: Webb
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005260:Female; D006213:Hallucinogens / Q000652:urine*; D006801:Humans; D008238:Lysergic Acid Diethylamide / Q000652:urine*; D008297:Male; D013058:Mass Spectrometry; D008956:Models, Chemical
chemical_list: D006213:Hallucinogens; D008238:Lysergic Acid Diethylamide