On the Preservation of Urines for the Determination of Citrate
It is known that bacteria use citrate as a source of carbon and many growth media contain citrate. Since many urines contain bacteria, citrate concentration may decrease during the collection of urines or in the time between the collection and the citrate determination. Normal ranges, evaluated by different authors by means of the same method differ from each other. This could be caused by varying degrees of destruction of citrate by different urinary bacteria. In this paper we have studied some preservatives to find the one best suited to protect citrate. This preservative should not interfere with other methods used for the determination of other variables in the urine of stone patients.
KeywordsSodium Azide Streptomycin Sulfate Stone Patient Citrate Concentration Chloride Ethyl
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