title: Organic solvents compromise performance of internal standard (ascomycin) in proficiency testing of mass spectrometry-based assays for tacrolimus.
authors.forename: Kimberly L
authors.initials: KL
authors.lastname: Napoli
mesh_terms: D000097:Acetonitriles; D002853:Chromatography, Liquid; D006801:Humans; D007166:Immunosuppressive Agents / Q000032:analysis*; D013058:Mass Spectrometry; D000432:Methanol; D011786:Quality Control; D012015:Reference Standards; D012997:Solvents; D016559:Tacrolimus / Q000031:analogs & derivatives* / Q000032:analysis* / Q000592:standards
chemical_list: D000097:Acetonitriles; D007166:Immunosuppressive Agents; D012997:Solvents; C058028:immunomycin; D016559:Tacrolimus; D000432:Methanol; C032159:acetonitrile