Abstract
Contamination of the exterior surface of vials of cytostatic drugs by the drugs themselves is a potential hazard to human health. This study developed a validated method using liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) for the determination of contamination of the exteriors of vials of cisplatin and carboplatin. Large Alpha® sampling swabs were employed to wipe the vial exterior. Cisplatin or carboplatin and gold(III) as an internal standard were derivatized by N,N-diethyldithiocarbamate (DDTC). Pt(DDTC)3+ and Au(DDTC)2+ were monitored by the respective transitions of m/z 639.3–490.9 and 493.0–345.0, respectively. Each separation was completed within 9min using a 3μm particle ODS-column. Calibration curves for cisplatin and carboplatin were linear over concentration ranges of 30–10,000 and 30–30,000pgvial−1, respectively. The accuracies and precisions were 96.1–102.5% and within 8.2% for intra-assay and 99.6–103.3% and within 7.6% for inter-assay, respectively. Their lower limit of quantification was 30pgvial−1. Amounts of 0.17–17.0ngvial−1 as cisplatin and 0.48–794ngvial−1 as carboplatin were detected from the exterior surface of the vials. This validated method using LC-ESI-MS/MS for the determination of platinum anticancer drugs is helpful for monitoring contamination of the exterior surface of drug vials.
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