Macromolecular Research, Vol.17, No.7, 516-521, July, 2009
Compatibility of Diazepam with Polypropylene Multilayer Infusion Container
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Techflex®, a polypropylene-lined, multilayer infusion bag, was studied for its compatibility with diazepam, in comparison to the conventional infusion bag, Safeflex®, which is comprised of poly(vinyl chloride) (PVC). Diazepam was diluted in 0.9% sodium chloride isotonic solution and stored in the infusion bags for 24 h. To evaluate the sorption of diazepam into the infusion bags during storage, the concentration of the drug remaining in the bag was measured using gas chromatography-mass spectroscopy. The PVC bags exhibited a marked sorption of diazepam,
with a drug loss reaching up to 90% of the initial concentration after 24 h of contact, whereas Techflex® inhibited the drug sorption, showing approximately 10%, under the same conditions. The differences in the sorption behaviors of the bags are discussed in terms of solubility parameters and crystallinities of the polymers.
Keywords:polypropylene;poly(vinyl chloride);diazepam;infusion;container;bag;multilayer;compatibility;crystallinity;solubility.
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