Growth of calcium oxalate monohydrate on uric acid crystals at sustained supersaturation

The effect of uric acid seeds on calcium oxalate formation was studied at pH 4.50 and 37 °C using a system providing constant supersaturation with respect to calcium oxalate and saturated in uric acid. In all cases the only solid‐phase forming was identified as calcium oxalate monohydrate (COM). Kin...

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Bibliographic Details
Published in:Crystal research and technology (1979) 2004-08, Vol.39 (8), p.699-704
Main Authors: Bouropoulos, C., Vagenas, N., Klepetsanis, P., Stavropoulos, N., Bouropoulos, N.
Format: Article
Language:English
Subjects:
calcium oxalate
constant supersaturation
uric acid
urinary stones
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Summary:The effect of uric acid seeds on calcium oxalate formation was studied at pH 4.50 and 37 °C using a system providing constant supersaturation with respect to calcium oxalate and saturated in uric acid. In all cases the only solid‐phase forming was identified as calcium oxalate monohydrate (COM). Kinetic analysis of the initial rates showed that they were proportional with the relative supersaturation with respect to calcium oxalate monohydrate. The linear dependence of the rate of precipitation of COM on uric acid suggested that growth is mediated through a surface diffusion controlled mechanism. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0232-1300
1521-4079
DOI:10.1002/crat.200310241