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Updated: Feb 5, 2026

Neural Tube Closure in Mouse Whole Embryo Culture
Published on: October 21, 2011
Research on the relationship between cephalosporin structure, solution clarity, and rubber closure compatibility
Xiao-Meng Chong1, Xin Dong1, Shang-Chen Yao1
1a National Institutes for Food and Drug Control , Beijing , China.
Objective:
Establish an effective experimental strategy to determine the compatibility of rubber closures for drugs.
Significance:
Various types of rubber closures with different compositions are available for drug packaging. Many additives of rubber closures can be released from rubber closures and may affect the quality of drugs and pose a risk to human health. In this study, we aimed to determine the relationship between cephalosporin structure, solution clarity, and rubber closure compatibility using volatile components profile of butyl rubber closures.
Methods:
Two opposite polarity gas chromatography (GC) systems and GC-mass spectrometry (MS) were used to achieve rapid qualitative determination of the main volatile components in rubber closures. Simulated adsorption experiment was performed to investigate the adsorption of main volatile components in rubber closures by cephalosporins with different side chain structures, and to determine the effects of adsorption on solution clarity.
Results:
A volatile components screening library of rubber closures was established and the structures of some volatile component were confirmed. The specific adsorption of the structure of cephalosporins on volatile components from rubber closures was studied.
Conclusion:
Based on the results of this study, rubber closures with good compatibility for cephalosporins with different side chain structures can be selected rapidly. This experimental strategy not only facilitates the screening of suitable rubber closures more effectively, but also enables the quick determination of volatile components adsorbed by drugs.
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