# Direct and rapid quantitation of ephedrines in human urine by paper spray ionization/high resolution mass spectrometry

> Research article (Journal of Chromatography B, 2016) · cited 21× · AI/ML

**Wikidata**: [openalex:W2464582143](https://www.wikidata.org/wiki/openalex:W2464582143)  
**Source**: https://4ort.xyz/entity/direct-and-rapid-quantitation-of-ephedrines-in-human-urine-by-paper-spray-ionization-high-resolution-mass-spectrometry