AAPS PharmSciTech

, Volume 14, Issue 1, pp 74–77 | Cite as

Adsorption and Degradation of Doxorubicin from Aqueous Solution in Polypropylene Containers

Research Article

Abstract

The purpose of this study was to examine doxorubicin adsorption in polypropylene containers as a function of pH and drug concentration based on anecdotal evidence of such adsorption. Doxorubicin loss was first examined in high-performance liquid chromatography (HPLC) glass inserts by UV absorbance to determine appropriate pH and time durations for subsequent analysis. Doxorubicin loss was then investigated in polypropylene microcentrifuge tubes at different pH values and starting drug concentration at 37°C over 48 h using HPLC with fluorescent detection. Doxorubicin concentrations was essentially constant in HPLC glass inserts at pH 4.8 up to 12 h but declined 5% at pH 7.4 by 3 h. The percent doxorubicin adsorption was calculated in polypropylene microcentrifuge tubes from extrapolations to zero time and was the least at pH 4.8, but increased with pH values 6.5 and 7.4, and decreased with drug concentration to reach a maximum adsorption of 45% in 2.0 μg/mL at pH 7.4 and 37°C. Degradation rate constants, ranging from 0.0021 to 0.019 h−1, also increased with pH in these studies. Determinations of low amounts of doxorubicin in polypropylene containers at pH 7.4 may be underestimated if adsorption and degradation issues are not taken into account.

KEY WORDS

adsorption analysis chemical stability doxorubicin glass HPLC polypropylene 

Notes

Acknowledgments

The authors wish to thank Bristol-Myers Squibb for donation of doxorubicin and Steven Neau, Ph.D, at University of the Sciences in Philadelphia, for helpful discussions. Financial support was received for this investigation from NIH R15CA135421.

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Copyright information

© American Association of Pharmaceutical Scientists 2012

Authors and Affiliations

  1. 1.Department of Pharmaceutical Sciences, Philadelphia College of PharmacyUniversity of the Sciences in PhiladelphiaPhiladelphiaUSA

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