Crystallization Characteristics of Synthetic Urine in a Fast Evaporator

  • A. L. Rodgers
  • M. A. E. Wandt


Many different approaches to the study of the physico-chemical factors governing urolithiasis have been employed in the past. Several workers have examined diffusion-limited systems in which component ions are permitted to diffuse into a stagnant urine solution causing encrustations to grow on fibers suspended in the medium1–3.Others have examined the inhibitory effects of certain ions, again employing static supersaturated systems4–6. On the other hand, the urinary tract has been considered as a sequence of continuous crystallizers7,8 and many studies have been conducted in such mixed suspension mixed product removal (MSMPR)9,11 systems. Hallson and Rose12 employed yet another approach in which urine samples were subjected to rapid evaporation at 37°C. They point out that such a process is analogous to that whereby urine is concentrated in the renal tubules by water removal. We decided to carry out a series of crystallization experiments using a fast evaporator system similar to that described by these latter workers in an attempt to gain insight into some of the physico-chemical factors governing crystalluria and urolithiasis.


Calcium Oxalate Monohydrate Crystallization Experiment Rapid Evaporation Calcium Oxalate Monohydrate Calcium Oxalate Dihydrate 
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Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • A. L. Rodgers
    • 1
  • M. A. E. Wandt
    • 1
  1. 1.Dept. of Physical ChemistryUniversity of Cape TownRondebosch, Cape TownRepublic of South Africa

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