| Autor: |
Ng CH; Bioprocess Technology, Asian Institute of Technology, P.O. Box 4, Klong Luang, Pathumthani 12120, Bangkok, Thailand., Hein S, Chandrkrachang S, Stevens WF |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of biomedical materials research. Part B, Applied biomaterials [J Biomed Mater Res B Appl Biomater] 2006 Jan; Vol. 76 (1), pp. 155-60. |
| DOI: |
10.1002/jbm.b.30353 |
| Abstrakt: |
Functional properties of the amino polysaccharides, chitin and chitosan, vary significantly with their acetyl content. The acid hydrolysis-HPLC method offers good accuracy and precision to assay the acetyl content regardless of the solubility of the sample. In this research, the hydrolysis parameters were changed, and the analytical method was counterchecked with other methods. Complete hydrolysis was achieved by mixing chitosan with 1.4 mM oxalic acid and 12 M sulfuric acid followed by treatment at 110 degrees C for 40 min. A sealed glass ampule was used instead of a vacuum hydrolysis tube. The acetic acid released during acid hydrolysis was measured quantitatively by HPLC. A high correlation (r(2) = 0.98) was obtained between the modified HPLC assay and the solid-state (13)C CP/MAS NMR method for the samples of various crustacean sources with a wide range of acetyl contents. The modified HPLC method was also highly correlated (r(2) = 0.99) with the first derivative UV method for soluble chitosan. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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