Gas chromatography-mass spectrometric method for the screening and quantification of illicit drugs and their metabolites in human urine using solid-phase extraction and trimethylsilyl derivatization.
A simple and rapid GC-MS method has been developed for the screening and quantification of many illicit drugs and their metabolites in human urine by using automatic SPE and trimethylsilylation. Sixty illicit drugs, including parent drugs and their metabolites that are possibly abused in Korea, can be monitored by this method. Among them, 24 popularly abused illicit drugs were selected for quantification. Very delicate optimizations were carried out in SPE, trimethylsilylation derivatization, and GC/MS to enable such remarkable achievements. Trimethylsilylated analytes were well separated within 21 min by GC-MS. In the validation results, the LOD of all the analytes were in the range of 2-75 ng/mL. The LOQ of the quantified analytes were in the range of 5-98 ng/mL. The linearity (r(2)) of the quantified analytes ranged 0.990-1.000 in each concentration range between 10 and 1000 ng/mL. The mean recoveries ranged from 62 to 126% at three different concentrations of each analyte. The inter-day and inter-person accuracies were within -13.3 approximately 14.9%, and -10.1 approximately 13.0%, respectively, and the inter-day and inter-person precisions were less than 12.9%. The method was reliable and efficient for the screening and quantification of abused illicit drugs in routine urine analysis.
Cheong
Jae Chul
JC
Drug Analysis Laboratory, Forensic Science Division, Banporo, Seocho-gu, Seoul, Korea.
Suh
Sung Ill
SI
Ko
Beom Jun
BJ
Kim
Jin Young
JY
In
Moon Kyo
MK
Cheong
Won Jo
WJ
D002138:Calibration; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D013287:Illicit Drugs / Q000652:urine*; D057230:Limit of Detection; D012015:Reference Standards; D015203:Reproducibility of Results; D052616:Solid Phase Extraction; D014297:Trimethylsilyl Compounds / Q000737:chemistry*
D013287:Illicit Drugs; D014297:Trimethylsilyl Compounds