2022
Resolving icteric interference by a novel photoisomerization device: Bilibox
Vera MA, Koch CD, El-Khoury JM. Resolving icteric interference by a novel photoisomerization device: Bilibox. Clinical Biochemistry 2022, 115: 112-115. PMID: 35882276, DOI: 10.1016/j.clinbiochem.2022.07.004.Peer-Reviewed Original ResearchConceptsDirect bilirubinIcteric interferenceAforementioned analytesChemical reactivityPhotoisomerizationRoutine laboratory testingEndogenous interferencesBilirubin elevationBaseline creatinineAssay reagentsLaboratory testingDilutional methodMin of treatmentCreatinineEnzymatic creatinine assayIcterusBilirubinChemistry testingClinical samplesCreatinine assaysHeparin vacutainersTreatmentAnalytesIctericRepeat measurements
2011
A simple and fast liquid chromatography–tandem mass spectrometry method for measurement of underivatized l-arginine, symmetric dimethylarginine, and asymmetric dimethylarginine and establishment of the reference ranges
El-Khoury JM, Bunch DR, Reineks E, Jackson R, Steinle R, Wang S. A simple and fast liquid chromatography–tandem mass spectrometry method for measurement of underivatized l-arginine, symmetric dimethylarginine, and asymmetric dimethylarginine and establishment of the reference ranges. Analytical And Bioanalytical Chemistry 2011, 402: 771-779. PMID: 22124751, DOI: 10.1007/s00216-011-5462-9.Peer-Reviewed Original ResearchConceptsFast liquid chromatography–tandem mass spectrometry methodAnalytical cycle timeChromatography-tandem mass spectrometry methodLiquid chromatography-tandem mass spectrometry methodMinimum sample preparationMass spectrometry methodLiquid chromatography-tandem mass spectrometryChromatography-tandem mass spectrometryAsymmetric dimethylarginineSymmetric dimethylarginineLC-MS/MS methodMass spectrometerFormic acidSpectrometry methodMass spectrometrySilica columnProtein precipitationSample preparationInternal standardAmmonium acetateMS methodGlomerular filtration rateAnalytesNitric oxide synthaseΜM