title: Trouble with the analysis of nitrite, nitrate, S-nitrosothiols and 3-nitrotyrosine: freezing-induced artifacts?
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Tsikas
authors.forename: Jürgen C
authors.initials: JC
authors.lastname: Frölich
mesh_terms: D016477:Artifacts; D005615:Freezing; D008401:Gas Chromatography-Mass Spectrometry; D009566:Nitrates / Q000032:analysis* / Q000737:chemistry; D009569:Nitric Oxide / Q000737:chemistry; D009573:Nitrites / Q000032:analysis* / Q000737:chemistry; D026403:S-Nitrosothiols / Q000032:analysis* / Q000737:chemistry; D014443:Tyrosine / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry
chemical_list: D009566:Nitrates; D009573:Nitrites; D026403:S-Nitrosothiols; D009569:Nitric Oxide; C002744:3-nitrotyrosine; D014443:Tyrosine