Qualitative and Quantitative Analysis of Five Indoles or Indazole Amide Synthetic Cannabinoids in Suspected E-Cigarette Oil by GC-MS.
10.12116/j.issn.1004-5619.2022.320101
- Author:
Cui-Mei LIU
1
;
Wei JIA
1
;
Chun-Hui SONG
2
;
Zhen-Hua QIAN
1
;
Zhen-Dong HUA
1
;
Yue-Meng CHEN
3
Author Information
1. Key Laboratory of Drug Monitoring and Control, Drug Intelligence and Forensic Center, Ministry of Public Security, Beijing 100193, China.
2. School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
3. Drug Control Detachment of Guiyang Public Security Bureau, Guiyang 550081, China.
- Publication Type:Journal Article
- Keywords:
e-cigarette oil;
forensic toxicology;
gas chromatography-mass spectrometry (GC-MS);
indazole amide;
indole;
synthetic cannabinoids
- MeSH:
Gas Chromatography-Mass Spectrometry/methods*;
Electronic Nicotine Delivery Systems;
Illicit Drugs/analysis*;
Indazoles/chemistry*;
Glycerol/analysis*;
Cannabinoids;
Indoles/chemistry*;
Ions
- From:
Journal of Forensic Medicine
2023;39(5):457-464
- CountryChina
- Language:English
-
Abstract:
OBJECTIVES:To establish the GC-MS qualitative and quantitative analysis methods for the synthetic cannabinoids, its main matrix and additives in suspicious electronic cigarette (e-cigarette) oil samples.
METHODS:The e-cigarette oil samples were analyzed by GC-MS after diluted with methanol. Synthetic cannabinoids, its main matrix and additives in e-cigarette oil samples were qualitatively analyzed by the characteristic fragment ions and retention time. The synthetic cannabinoids were quantitatively analyzed by using the selective ion monitoring mode.
RESULTS:The linear range of each compound in GC-MS quantitative method was 0.025-1 mg/mL, the matrix recovery rate was 94%-103%, the intra-day precision relative standard deviations (RSD) was less than 2.5%, and inter-day precision RSD was less than 4.0%. Five indoles or indazole amide synthetic cannabinoids were detected in 25 e-cigarette samples. The main matrixes of e-cigarette samples were propylene glycol and glycerol. Additives such as N,2,3-trimethyl-2-isopropyl butanamide (WS-23), glycerol triacetate and nicotine were detected in some samples. The content range of synthetic cannabinoids in 25 e-cigarette samples was 0.05%-2.74%.
CONCLUSIONS:The GC-MS method for synthesizing cannabinoid, matrix and additive in e-cigarette oil samples has good selectivity, high resolution, low detection limit, and can be used for simultaneous qualitative and quantitative analysis of multiple components; The explored fragment ion fragmentation mechanism of the electron bombardment ion source of indole or indoxamide compounds helps to identify such substances or other compounds with similar structures in cases.
