YAKHAK HOEJI (약학회지)

The Pharmaceutical Society of Korea (대한약학회)
권호 표지

Uncertainty Evaluation of the Analysis of 11-Nor-9-carboxy-${\Delta}^9$-tetrahydrocannabinol in Human Urine by GC/MS

GC/MS를 이용한 소변 중 대마 대사체 분석의 측정불확도 평가

  • Kim, Jin-Young (Drug Analysis Laboratory, Supreme Prosecutors' Office) ;
  • Jeong, Jae-Chul (Drug Analysis Laboratory, Supreme Prosecutors' Office) ;
  • Suh, Sung-Ill (Drug Analysis Laboratory, Supreme Prosecutors' Office) ;
  • Suh, Yong-Jun (Drug Analysis Laboratory, Supreme Prosecutors' Office) ;
  • Lee, Jeong-Jik (Department of Quality Management, Korea Institute of Construction Materials) ;
  • Kim, Jong-Sang (Department of Quality Management, Korea Institute of Construction Materials) ;
  • In, Moon-Kyo (Drug Analysis Laboratory, Supreme Prosecutors' Office)
  • Published : 2008.12.31
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Abstract

We described an estimation of measurement uncertainty in quantitative analysis of 11-nor-9-carboxy-${\Delta}^9$-tetrahydrocannabinol (THCCOOH), the major metabolite of ${\Delta}^9$-tetrahydrocannabinol, in urine sample by solid-phase extraction (SPE) and GC/MS detection. The analytical results were compared and the different contributions to the uncertainty were evaluated. Inter-day and inter-person validation were performed using statistical analysis of several indicative factors. Measurement uncertainty associated with target analyte in real forensic samples was estimated using quality control (QC) data. Traceability of measurement was established through traceable standards, calibrated volumetric glassware and volume measuring device. The major factors of contribution to combined standard uncertainty, were calibration linearity, inter-day repeatability and inter-person reproducibility, while those associated with preparation of analytical standards and sampling volume were not so important considering the degree of contribution. Relative combined standard uncertainties associated with the described method was 12.05% for THCCOOH.

Keywords

References

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