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Simultaneous quantitative determination of amphetamines, ketamine, opiates and metabolites in human hair by gas chromatography/mass spectrometry.
Rapid Commun Mass Spectrom. 2008; 22(6):887-97.RC

Abstract

A gas chromatography/mass spectrometry (GC/MS) method was developed and validated for the determination of common drugs of abuse in Asia. The method was able to simultaneously quantify amphetamines (amphetamine; AP, methamphetamine; MA, methylenedioxy amphetamine; MDA, methylenedioxymeth mphetamine; MDMA, methylenedioxy ethylamphetamine; MDEA), ketamine (ketamine; K, norketamine; NK), and opiates (morphine; MOR, codeine; COD, 6-acetylmorphine; 6-AM) in human hair. Hair samples (25 mg) were washed, cut, and incubated overnight at 25 degrees C in methanol/trifluoroacetic acid (methanol/TFA). The samples were extracted by solid-phase extraction (SPE), derivatized using heptafluorobutyric acid anhydride (HFBA) at 70 degrees C for 30 min, and the derivatives were analyzed by electron ionization (EI) GC/MS in selected ion monitoring mode. Confirmation was accomplished by comparing retention times and the relative abundances of selected ions with those of standards. Deuterated analogs of the analytes were used as internal standards for quantification. Calibration curves for ten analytes were established in the concentration range 0.1-10 ng/mg with high correlation coefficients (r2 > 0.999). The intra-day and inter-day precisions were within 12.1% and 15.8%, respectively. The intra-day and inter-day accuracies were between -8.7% and 10.7%, and between -5.9% and 13.8%, respectively. The limit of detection (LOD) and limit of quantification (LOQ) obtained were 0.03 and 0.05 ng/mg for AP, MA, MDA, MDMA and MDEA; 0.05 and 0.08 ng/mg for K, NK, MOR and COD; and 0.08 and 0.1 ng/mg for 6-AM. The recoveries were above 88.6% for all the compounds, except K and NK which were in the range of 71.7-72.7%. Eight hair samples from known polydrug abusers were examined by this method. These results show that the method is suitable for broad-spectrum drug testing in a single hair specimen.

Authors+Show Affiliations

Institute of Medical and Molecular Toxicology, Chung Shan Medical University, Taichung, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18288687

Citation

Wu, Ya-Hsueh, et al. "Simultaneous Quantitative Determination of Amphetamines, Ketamine, Opiates and Metabolites in Human Hair By Gas Chromatography/mass Spectrometry." Rapid Communications in Mass Spectrometry : RCM, vol. 22, no. 6, 2008, pp. 887-97.
Wu YH, Lin KL, Chen SC, et al. Simultaneous quantitative determination of amphetamines, ketamine, opiates and metabolites in human hair by gas chromatography/mass spectrometry. Rapid Commun Mass Spectrom. 2008;22(6):887-97.
Wu, Y. H., Lin, K. L., Chen, S. C., & Chang, Y. Z. (2008). Simultaneous quantitative determination of amphetamines, ketamine, opiates and metabolites in human hair by gas chromatography/mass spectrometry. Rapid Communications in Mass Spectrometry : RCM, 22(6), 887-97. https://doi.org/10.1002/rcm.3409
Wu YH, et al. Simultaneous Quantitative Determination of Amphetamines, Ketamine, Opiates and Metabolites in Human Hair By Gas Chromatography/mass Spectrometry. Rapid Commun Mass Spectrom. 2008;22(6):887-97. PubMed PMID: 18288687.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Simultaneous quantitative determination of amphetamines, ketamine, opiates and metabolites in human hair by gas chromatography/mass spectrometry. AU - Wu,Ya-Hsueh, AU - Lin,Keh-Liang, AU - Chen,Su-Chin, AU - Chang,Yan-Zin, PY - 2008/2/22/pubmed PY - 2008/5/30/medline PY - 2008/2/22/entrez SP - 887 EP - 97 JF - Rapid communications in mass spectrometry : RCM JO - Rapid Commun. Mass Spectrom. VL - 22 IS - 6 N2 - A gas chromatography/mass spectrometry (GC/MS) method was developed and validated for the determination of common drugs of abuse in Asia. The method was able to simultaneously quantify amphetamines (amphetamine; AP, methamphetamine; MA, methylenedioxy amphetamine; MDA, methylenedioxymeth mphetamine; MDMA, methylenedioxy ethylamphetamine; MDEA), ketamine (ketamine; K, norketamine; NK), and opiates (morphine; MOR, codeine; COD, 6-acetylmorphine; 6-AM) in human hair. Hair samples (25 mg) were washed, cut, and incubated overnight at 25 degrees C in methanol/trifluoroacetic acid (methanol/TFA). The samples were extracted by solid-phase extraction (SPE), derivatized using heptafluorobutyric acid anhydride (HFBA) at 70 degrees C for 30 min, and the derivatives were analyzed by electron ionization (EI) GC/MS in selected ion monitoring mode. Confirmation was accomplished by comparing retention times and the relative abundances of selected ions with those of standards. Deuterated analogs of the analytes were used as internal standards for quantification. Calibration curves for ten analytes were established in the concentration range 0.1-10 ng/mg with high correlation coefficients (r2 > 0.999). The intra-day and inter-day precisions were within 12.1% and 15.8%, respectively. The intra-day and inter-day accuracies were between -8.7% and 10.7%, and between -5.9% and 13.8%, respectively. The limit of detection (LOD) and limit of quantification (LOQ) obtained were 0.03 and 0.05 ng/mg for AP, MA, MDA, MDMA and MDEA; 0.05 and 0.08 ng/mg for K, NK, MOR and COD; and 0.08 and 0.1 ng/mg for 6-AM. The recoveries were above 88.6% for all the compounds, except K and NK which were in the range of 71.7-72.7%. Eight hair samples from known polydrug abusers were examined by this method. These results show that the method is suitable for broad-spectrum drug testing in a single hair specimen. SN - 0951-4198 UR - https://www.unboundmedicine.com/medline/citation/18288687/Simultaneous_quantitative_determination_of_amphetamines_ketamine_opiates_and_metabolites_in_human_hair_by_gas_chromatography/mass_spectrometry_ L2 - https://doi.org/10.1002/rcm.3409 DB - PRIME DP - Unbound Medicine ER -