… traceability of results of urea measurements in human serum. We developed a measurement
procedure using the principle of isotope dilution gas chromatography/mass spectrometry. …

… In the present investigation a definitive method for the determination of creatinine in
human serum is described which is based on the principle of istope dilution-mass …

… Inductively coupled plasma mass … Human blood and serum were diluted ten times for whole
one of the most sensitive trace element techniques available, blood and five times for serum, …

… -based isotope dilution mass spectrometry approach for Cystatin C determination in human
serum samples, a clinical marker for renal status for which backup by a mass spectrometry …

… of serum with a combination of ethyl acetate and hexane, we quantified testosterone by
isotope-dilution liquid chromatography–tandem mass … total testosterone in human serum. …

… U15) etc. have utilized isotope dilution mass spectrometry (IDMS) as one … of vital analytes
present in human serum. … assigning certified values to human serum reference materials within …

… An isotope dilution mass spectrometry (IDMS) technique has been … in human serum.
Currently, all the IDMS methods for glucose analysis are based on gas chromatography–mass …

… isotope-dilution coupled with liquid chromatography/mass … to certify concentrations in
serum-based Standard Reference … in serum using liquid chromatography-mass spectrometry with …

Background: Current clinical methods for folate give different results and cannot measure
the various forms of folate. We developed an isotope-dilution tandem mass spectrometric …

… sera for internal and external quality control. In the present investigation, an analytical protocol
using the isotope dilution mass … of thyroxine in human serum. The procedure consists of …