Stability of cannabinoids in hair samples exposed to sunlight
The cannabinoid content in the hair samples was determined by gas chromatography-mass spectrometry. Each strand was pulverized in a ball mill, and ∼50 mg of the hair powder was weighed; 25 ng of THC-d3 (Radian International) was added as internal standard, and the sample was further processed accord...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
01 November 2000
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| In: |
Clinical chemistry
Year: 2000, Volume: 46, Issue: 11, Pages: 1846-1848 |
| ISSN: | 1530-8561 |
| DOI: | 10.1093/clinchem/46.11.1846 |
| Online Access: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1093/clinchem/46.11.1846 Verlag, lizenzpflichtig, Volltext: https://academic.oup.com/clinchem/article/46/11/1846/5641260 
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| Author Notes: | Gisela Skopp, Lucia Pötsch, and Martin Mauden |
| Summary: | The cannabinoid content in the hair samples was determined by gas chromatography-mass spectrometry. Each strand was pulverized in a ball mill, and ∼50 mg of the hair powder was weighed; 25 ng of THC-d3 (Radian International) was added as internal standard, and the sample was further processed according to Cirimele et al. (12). A 1-μL aliquot of the extract was injected into a gas chromatography-mass spectrometry system [HP 6890 gas chromatograph and HP 6890 mass spectrometer, both from Hewlett Packard; column, CP-Sil 5, 12.5 m × 0.53 mm (i.d.), from Chrompack]. Detection was by ionization in the electron impact mode (70 eV), with the scan mode set at single-ion monitoring (THC, m/z 299, 314, 271; THC-d3, m/z 302, 317, 274; CBN, m/z 295, 310, 238; CBD, m/z 231, 246, 314). Measurements were taken twice from each strand. The THC concentrations determined from a particular sample differed by at least 15% and are given as mean values (n = 4; Table 1 ). Deuterated standards for CBN and CDB are not yet commercially available; hence, these compounds were not quantified, and triplicate measurements of six drug-free hair samples were used to estimate their particular detection limits (mean + 3 SD). The limit of detection was 0.05 ng/mg of hair for all analytes. |
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| Item Description: | Gesehen am 21.04.2021 |
| Physical Description: | Online Resource |
| ISSN: | 1530-8561 |
| DOI: | 10.1093/clinchem/46.11.1846 |