Creatinine is isolated from lyophilized serum or urine with added [15N2] creatinine by high-
performance liquid chromatography. It is converted to the di-trifluoroacetate of the (2 …

A fast and sensitive method for the separation of serum and urinary creatinine is described.
For the preliminary purification of serum and urine, a cation-exchange column is used to …

A sensitive method for the specific determination of creatinine in whole blood, plasma, and
urine with high precision and accuracy is described. Samples were deproteinized by …

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A simple, rapid, reproducible HPLC method is described for the analysis of creatinine in
human plasma and urine. Creatinine is isolated from plasma proteins prior to HPLC analysis …

Materials and Methods Equipment We used class A volumetric pipettes for preparing
creatinine calibration solutions. All other pipetting operations were performed with either …

An Isotope dilution mass spectrometrlc (ID/MS) method for serum creatinine Is described
which uses creatlnlne-13C2 as the labeled Internal standard. Creatinine Is separated from …

For several years we have been interested in the urinary concentrations of neurotransmitters
and their metabolites in mental disease as a means of improving diagnosis and treatment …

HPLC with various detection methods, including ultraviolet absorbance, is frequently used to
separate and measure creatinine and creatine in serum, plasma, and urine. Current HPLC …

Determination of Creatinine in Human Serum by Isotope Dilution-Mass Spectrometry Page 1 L.
Siekmann: Determination of creatinine by isotope dilution-mass spectrometry \37 J. Clin. Chem …