Simultaneous Determination of Creatinine and Creatine in Human Serum by Double-Spike Isotope Dilution Liquid Chromatographyu2212 Tandem Mass Spectrometry (LC-MS/MS) and Gas Chromatographyu2212 Mass Spectrometry (GC-MS)
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Preparation and certification of creatinine and urea reference materials with certified purity as a traceability source in clinical chemical measurements
,† M. Elena Añ on A ́ ́ lvarez,‡ Felix Rodríguez,§ Francisco V. Á lvarez Menendez, ́ ‡ and J. Ignacio García Alonso – Anal. Chem. 2015, 87, 7, 3755–3763
Akiko Takatsu Æ Sakae Eyama Æ Mika Saeki – Accred Qual Assur (2008) 13:409–413
