Article (Scientific journals)
A simple LC-MS method for the determination of iohexol and iothalamate in serum, using ioversol as an internal standard.
Nyssen, Laurent; DELANAYE, Pierre; Le Goff, Caroline et al.
2016In Clinica Chimica Acta, 463, p. 96-102
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Keywords :
Glomerular filtration rate; Iohexol; Iothalamate; Ioversol; LC-MS; Nephrology
Abstract :
[en] BACKGROUND: Chronic kidney disease (CKD) is diagnosed and explored through the determination of the glomerular filtration rate (GFR). Our goal was to develop a simple LC-MS method for the determination in serum of 2 popular GFR markers, contrast agents iohexol and iothalamate, for routine use and comparison studies between the two markers. A similar contrast agent, ioversol, was used as an internal standard and the method underwent a rigorous validation protocol based on beta-expectation tolerance intervals. METHODS: We adapted the HPLC-UV method from Cavalier et al. to our LC-MS system. Data treatment for the validation was performed using Multiquant 3.0 (Sciex, Framingham, MA, USA) and e.noval 3.0 software (Arlenda, Liege, Belgium). RESULTS: According to the validation results our method will give accurate and reliable results for concentrations ranging from 6.8 to 250mug/ml for iohexol and 6.15mug/ml to 250mug/ml for iothalamate. In our practice these intervals are sufficient to determine both compounds in most patient samples. Samples with higher detected concentrations can always be diluted into range. CONCLUSION: With its internal standard and extensive validation, our method is now ready for routine and clinical research use.
Disciplines :
Laboratory medicine & medical technology
Author, co-author :
Nyssen, Laurent ;  Université de Liège > Département de pharmacie > Chimie médicale
DELANAYE, Pierre  ;  Centre Hospitalier Universitaire de Liège - CHU > Service de néphrologie
Le Goff, Caroline  ;  Université de Liège > Département de pharmacie > Chimie médicale
PEETERS, Stéphanie ;  Centre Hospitalier Universitaire de Liège - CHU > Service de chimie clinique
Cavalier, Etienne  ;  Université de Liège > Département de pharmacie > Chimie médicale
Language :
English
Title :
A simple LC-MS method for the determination of iohexol and iothalamate in serum, using ioversol as an internal standard.
Publication date :
2016
Journal title :
Clinica Chimica Acta
ISSN :
0009-8981
eISSN :
1873-3492
Publisher :
Elsevier, Netherlands
Volume :
463
Pages :
96-102
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2016. Published by Elsevier B.V.
Available on ORBi :
since 10 January 2017

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