International Journal of Clinical and Laboratory Research

, 29:103

Rapid determination of creatinine in serum and urine by ion-pair high-performance liquid chromatography

  • R. Marsilio
  • R. Dall’Amico
  • D. Giordano
  • L. Murer
  • G. Montini
  • M. Ros
  • N. Dussini
  • G. Zacchello
  • L. Bacelle
  • M. Plebani
Original

DOI: 10.1007/s005990050072

Cite this article as:
Marsilio, R., Dall’Amico, R., Giordano, D. et al. Int J Clin Lab Res (1999) 29: 103. doi:10.1007/s005990050072

Abstract

We report a simple and reliable high performance liquid chromatography method for measuring creatinine in serum and urine. The chromatographic run is performed on a C18 column after protein precipitation with acetone and addition of cimetidine as an internal standard. The separation is carried out in 20 min at a flow rate of 0.8 ml/min, with a mobile phase consisting of 100 mmol/l sodium dihydrogen phosphate solution, containing 30 mmol/l sodium lauryl sulfate pH 3.0 and acetonitrile (60:36, v/v). The absorbance is monitored at 200 nm. The relationship between creatinine concentration and the creatinine/internal standard peak area is linear up to 1,088 µmol/l. Within-run precision measured at three different creatinine concentrations ranges from 0.89% to 2.34% in serum and from 0.34% to 1.10% in urine. Between-run precision varies from 1.68% to 3.17% in serum and from 1.58% to 1.85% in urine over a wide range of concentrations. Analytical recovery is between 98.71% and 101.25% in serum and between 98.96% and 100.27% in urine. The detection limit is 3.24 µmol/l for a signal-to-noise ratio of 3. The method shows a good linearity with the reference isotope dilution gas chromatography-mass spectrometry procedure (r=0.999), without interferences, even in the presence of high bilirubin concentrations.

Key words

CreatinineHigh-performance liquid chromatographyGas chromatography-mass spectrometry

Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • R. Marsilio
    • 1
  • R. Dall’Amico
    • 1
  • D. Giordano
    • 1
  • L. Murer
    • 1
  • G. Montini
    • 1
  • M. Ros
    • 1
  • N. Dussini
    • 1
  • G. Zacchello
    • 1
  • L. Bacelle
    • 2
  • M. Plebani
    • 2
  1. 1.Department of PediatricsUniversity Hospital of PaduaPaduaItaly
  2. 2.Department of Laboratory MedicineUniversity of PaduaPaduaItaly