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AAPS PharmSciTech. 2006 June; 7(2): E144–E147.
Published online 2006 March 30. doi:  10.1208/pt070251
PMCID: PMC2750278

The effect of selected antioxidants on the kinetics of changes in the stability of an HTK solution: A technical note

Summary and Conclusions

The effect of selected antioxidants (vitamin C, cysteine, fumaric acid) on the stability of a 0.3-mM solution of HTK has been determined. The stability of the HTK solution was determined using the changes in histidine content at elevated temperatures. The rate of the amino acid decomposition in this solution was 42.3% lower than in a solution without an antioxidant.

Vitamin C is the most effective antioxidant. An HTK solution stored at +5°C is stable for 450 days with vitamin C added to it, for 265 days with cysteine, for 242 days with fumaric acid, and for 260 days with no antioxidant.

Keywords: HTK solution, stability, antioxidants, vitamin C, cysteine, fumaric acid

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
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Articles from AAPS PharmSciTech are provided here courtesy of American Association of Pharmaceutical Scientists