The establishment of a highly sensitive method in detecting ketamine and norketamine simultaneously in human hairs by HPLC-Chip-MS/MS.
An effective way to reveal the history of drug abuse is to determine the parental drug and its metabolites in hair. Here, a quantitative HPLC-Chip-MS/MS method was developed for simultaneous measurement of ketamine and its metabolite norketamine in human hair. Ketamine and norketamine were extracted from hair by acid hydrolysis, and then enriched by organic solvent extraction. The chromatographic separation was achieved in 15 min, with the drug identification and quantification by a tandem mass spectrometer. The linear regression analysis was calibrated by deuterated internal standards with a R(2) of over 0.996. The limit of detection (LOD) and the limit of quantification (LOQ) for ketamine and norketamine were 0.5 and 1 pg/mg of hair, respectively. The standard curves were linear from the value of LOQ up to 100 pg/mg of hair. The validation parameters including selectivity, accuracy, precision, stability and matrix effect were also determined. In conclusion, this method was able to reveal the present of ketamine and norketamine with less hair from the drug abusers, and which had the sensitivity of ∼1000-fold higher than the conventional method. In addition, the amount of ketamine and norketamine being detected in different hair segments would be useful in revealing the historical record of ketamine uptake in the drug abusers.
Division of Life Science, and Center for Chinese Medicine, The Hong Kong University of Science and Technology, Hong Kong, China.
Kevin Y
KY
Zhu
K Wing
KW
Leung
Annie K L
AK
Ting
Zack C F
ZC
Wong
Qiang
Q
Fu
Winki Y Y
WY
Ng
Roy C Y
RC
Choi
Tina T X
TT
Dong
Tiejie
T
Wang
David T W
DT
Lau
Karl W K
KW
Tsim
D018691:Excitatory Amino Acid Antagonists / Q000032:analysis* / Q000737:chemistry; D053593:Forensic Toxicology; D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation / Q000379:methods; D006197:Hair / Q000737:chemistry*; D006801:Humans; D007649:Ketamine / Q000031:analogs & derivatives* / Q000032:analysis* / Q000737:chemistry; D057230:Limit of Detection; D015394:Molecular Structure; D013048:Specimen Handling; D015813:Substance Abuse Detection / Q000379:methods*
D018691:Excitatory Amino Acid Antagonists; D007649:Ketamine; C033419:norketamine