I understood it was necessary to collect urine into acid (not accepatable to
acidify on receipt in lab) for urinary calcium, because some calcium salts
may precipitate out, and will not redissolve on acidification. I am aware of
the paper in the recent Annals, but that does not address patients with
different urinary calcium concentrations, and different preipitating
factors. Do others insist on collection into acid(not added later)?
Dr Helen Grimes
Department of Clinical Biochemistry
University College Hospital
Galway
Ireland
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