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The early warning of new psychoactive substance iso-propoxate (homologue of etomidate) was carried out through sewage drug monitoring technology, and quantitative research was conducted to provide technical support for management and law enforcement.
The abnormal results were obtained by quantitative analysis of multiple reaction monitoring (MRM) mode using online solid phase extraction-ultra high performance liquid chromatography tandem mass spectrometry (SPE-UPLC-MS/MS), and the basic information of abnormal substance was determined by precursor ion scanning mode. The qualitative determination was carried out using parallel reaction monitoring (PRM) mode by ultra high performance liquid chromatography quadrupole-orbitrap high resolution mass spectrometry (UPLC-Q exactive HRMS) after the directional synthesis of the compound. Quantitative study was then conducted by commercial reference products. The correlation analysis was carried out by SPSS 27.
The abnormal substance was determined to be iso-propoxate. The optimized MRM parameters could be distinguished from its isomers by specific ion abundance ratio. The correlation analysis of quantitative results showed that it was similar to etomidate and ketamine abuse areas.
In the process of sewage drug monitoring, it is necessary to pay attention to the proportional relationship between prototype and metabolite. It is important to summarize the characteristic fragments and characteristic neutral loss information of specific types of compounds, carry out screening non-targeted detection for key samples in key areas in the monitoring process, and analyze potential substances using high-resolution mass spectrometry and other methods, so as to fully leveraging the early warning role of sewage drug monitoring.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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