Abstract:
:A method has been developed for the simultaneous determination of lysergic acid diethylamide (LSD), its epimer iso-LSD, and its main metabolites nor-LSD and 2-oxo-3-hydroxy LSD in blood, urine, and, for the first time, vitreous humor samples. The method is based on liquid/liquid extraction and liquid chromatography-multiple mass spectrometry detection in an ion trap mass spectrometer, in positive ion electrospray ionization conditions. Five microliter of sample are injected and analysis time is 12 min. The method is specific, selective and sensitive, and achieves limits of quantification of 20 pg/ml for both LSD and nor-LSD in blood, urine, and vitreous humor. No significant interfering substance or ion suppression was identified for LSD, iso-LSD, and nor-LSD. The interassay reproducibilities for LSD at 20 pg/ml and 2 ng/ml in urine were 8.3 and 5.6%, respectively. Within-run precision using control samples at 20 pg/ml and 2 ng/ml was 6.9 and 3.9%. Mean recoveries of two concentrations spiked into drug free samples were in the range 60-107% in blood, 50-105% in urine, and 65-105% in vitreous humor. The method was successfully applied to the forensic determination of postmortem LSD levels in the biological fluids of a multi drug abuser; for the first time, LSD could be detected in vitreous humor.
journal_name
Int J Legal Medjournal_title
International journal of legal medicineauthors
Favretto D,Frison G,Maietti S,Ferrara SDdoi
10.1007/s00414-006-0078-xsubject
Has Abstractpub_date
2007-07-01 00:00:00pages
259-65issue
4eissn
0937-9827issn
1437-1596journal_volume
121pub_type
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journal_title:International journal of legal medicine
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