Handling of biological samples in the determination of the anti-neoplastic drug mitomycin C

J. Den Hartigh, G. Voortman, W. J. Van Oort, H. Weenen, H. M. Pinedo

Research output: Contribution to journalArticle

Abstract

A study to ascertain suitable conditions for handling biological samples from patients, treated with the antibiotic mitomycin C (MMC), with the objective of improving the accuracy and reliability of the determination is described. Situations frequently occurring in medical practice are simulated to optimize procedures for reliable and reproducible sampling, sample treatment and determination of MMC. Continuation of drug partitioning in whole blood after sampling can be prevented by immediate cooling in ice before the separation of plasma from cells. The adjustment of the pH of urine samples is shown to be particularly important since a low urinary pH causes decomposition of MMC; moreover, it may decrease extraction recovery. Furthermore, long-term exposure of samples to daylight induces drug decomposition. Frozen storage of plasma and urine samples for periods greater than 3 weeks is to be avoided as this results in a considerable drop in MMC concentration. Repeated cycles of freezing and thawing are shown to have no effect upon the analytical results (6 cycles tested). The analysis of extracts of biological samples may take place up to at least 24 h after their preparation without measurable loss of analyte.

Original languageEnglish (US)
Pages (from-to)417-423
Number of pages7
JournalJournal of Pharmaceutical and Biomedical Analysis
Volume3
Issue number5
DOIs
StatePublished - 1985
Externally publishedYes

Keywords

  • determination of anti-tumor agent mitomycin C
  • High-performance liquid chromatography
  • sample pre-treatment
  • uptake by red blood cells.

ASJC Scopus subject areas

  • Analytical Chemistry
  • Pharmaceutical Science

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