Nitrogen, oxygen-codoped hierarchically porous biochar for simultaneous enrichment and ultrasensitive determination of o-xylene and its hydroxyl metabolites in human urine by solid phase microextraction-gas chromatography-mass spectrometry
- Resource Type
- Article
- Source
- In
Microchemical Journal July 2022 178 - Subject
- Language
- ISSN
- 0026-265X