A validation study comparing accelerator MS and liquid scintillation counting for analysis of 14C-labelled drugs in plasma, urine and faecal extracts
- 12 December 2000
- journal article
- research article
- Published by Elsevier BV in Journal of Pharmaceutical and Biomedical Analysis
- Vol. 24 (2), 197-209
- https://doi.org/10.1016/s0731-7085(00)00397-6
Abstract
A comparison has been made between accelerator mass spectrometry (AMS) analysis and liquid scintillation counting (LSC) of plasma, urine and faecal samples containing 14C-labelled drugs. In an in vitro study in which human plasma was spiked (the term spiked is used in Section 2.6) with 14C-Fluconazole (14C-FL) over a concentration range of 0.1–2.5 dpm/ml, a correlation coefficient of 0.999 was determined for AMS analysis versus extrapolated LSC data. No significant day to day (or inter-day)variation was seen (P14C-Fluticasone propionate(14C-FP) showed that there was also a good correspondence between AMS and LSC data. A mass balance study in a single rat given the 0.9 μSievert human modelling dose of 14C-FP demonstrated that over 80% of the dose was excreted in the faeces by 96 h; less than 1% of the administered dose was excreted in the urine. The limit of reliable measurement of drug related material, above background concentrations, by AMS analysis in this study was approximately 0.1 dpm/ml for plasma, 0.01 dpm/ml for urine without any sample extraction or concentration and 0.01 dpm/ml for faecal extracts. The data reported here demonstrate that AMS is an ultrasensitive and reliable method for analysing 14C-labelled drugs in human and animal body fluids.Keywords
This publication has 13 references indexed in Scilit:
- HPLC−Accelerator MS Measurement of Atrazine Metabolites in Human Urine after Dermal ExposureAnalytical Chemistry, 1999
- Analytical Performance of Accelerator Mass Spectrometry and Liquid Scintillation Counting for Detection of 14C-Labeled Atrazine Metabolites in Human UrineAnalytical Chemistry, 1998
- Tissue distribution and macromolecular binding of extremely low doses of [14C]-benzene in B6C3F1 miceCarcinogenesis: Integrative Cancer Research, 1997
- Comparisons of the binding of [14C]radiolabelled tamoxifen or toremifene to rat DNA using accelerator mass spectrometryChemico-Biological Interactions, 1997
- MeIQx-DNA adduct formation in rodent and human tissues at low dosesMutation Research, 1997
- Accelerator mass spectrometryAnalytical Chemistry, 1995
- Dose-response studies of MeIQx in rat liver and liver DNA at low dosesCarcinogenesis: Integrative Cancer Research, 1995
- Accelerator mass spectrometry in biomedical dosimetry: relationship between low-level exposure and covalent binding of heterocyclic amine carcinogens to DNA.Proceedings of the National Academy of Sciences of the United States of America, 1990
- Radiocarbon Dating Using Electrostatic Accelerators: Negative Ions Provide the KeyScience, 1977
- Carbon-14: Direct Detection at Natural ConcentrationsScience, 1977