Method for target substance detection and measurement
US10408850B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2017 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Nov 21, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/7786
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various embodiments for a hand-held device to determine a level of one or more cannabinoid compounds in exhaled human breath are provided; some embodiments may also determine a level of alcohol in the exhaled breath. The device may perform any of the following steps: capture, concentrate, separate, identify, and quantify the level of cannabinoids in the exhaled human breath. The device may use solvent extraction and liquid chromatography to concentrate and separate cannabinoids from breath contaminants, followed by selective chemical modification of the cannabinoids with a fluorescent indicator for quantification. The measurement methodology may also include real time calibration of the device and detection protocol using known cannabinoid standards, which are simultaneously analyzed along with an unknown, to quantify the level of cannabinoids captured from the breath sample. The capture and separation components, along with cannabinoid analysis standards, may be configured as part of a single-use, field-replaceable testing cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.