Effect of Calcium Salts on Swelling and Erosion of Xanthan Gum Matrix Systems

Chaw, Cheng and LikWok-Cheong, Vanessa Jade (2013) Effect of Calcium Salts on Swelling and Erosion of Xanthan Gum Matrix Systems. In: 2013 AAPS Annual Meeting and Exposition, 10-14 Nov 2013, Henry B Gonzalez Convention Centre, San Antonio.


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Bivalent cations within the Xanthan gum (XG) matrix or in the dissolution medium affect the swelling and erosion profiles of
XG matrix system. This study aims to study the swelling and erosion behaviors of XG based cylindrical matrices loaded with
two different calcium salts.
XG based cylindrical matrices consisting of either calcium aminosalicylate (Ca4ASA) or calcium chloride (CaCl2), were
prepared using a single punch tableting machine. The ratios of Ca4ASA to XG were 1:5 and 1:3 while CaCl2 to XG were
~3:50 and ~3:20. The target weight of the matrices was adjusted to ~300mg. The swe
lling and erosion profiles of the matrices
were determined in pharmacopoeia buffer media adjusted to an ionic strength of 0.155M at pH values of 1.2 and 6.8. The
swelling index (SI) and erosion index (EI) of the matrices at the given time intervals were determined (up to 6 hours). For
each set of study, a plot of SI or EI vs.

Item Type: Conference or Workshop Item (Poster)
Subjects: Sciences > Pharmacy and Pharmacology
Divisions: Faculty of Health Sciences and Wellbeing
Faculty of Health Sciences and Wellbeing > School of Pharmacy and Pharmaceutical Sciences
Related URLs:
Depositing User: Hannah Dodd
Date Deposited: 14 Jul 2014 15:02
Last Modified: 18 Dec 2019 15:37
URI: http://sure.sunderland.ac.uk/id/eprint/5042
ORCID for Cheng Chaw: ORCID iD orcid.org/0000-0002-7450-4100

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