Distinguishing Isomeric Caffeine Metabolites through Protomers and Tautomers Using Cryogenic Gas-Phase Infrared Spectroscopy.

Anal Chem · 2025 · PMC12509192 · PMID 40994216

Europe PMC DOI

hedged sentence

—

closest p

—

boldest claim

The sentences

highly significantno p-value reported

Discussion In mass spectrometry-based metabolomics, protonated ions are the most likely ions in positive ionization mode, making their structural characterization highly significant.

also in 132,142 other papers

Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.