Title

Collection under paraffin is not necessary for stability of urine pH over 24 h.

Document Type

Article

Publication Date

2-1-2004

Identifier

DOI: 10.1007/s00467-003-1334-7

Abstract

Collection of urine under paraffin is routinely used in clinical practice for urine pH evaluation. To examine whether the accuracy of pH measurement is adversely influenced by the method of collection and storage, we divided each urine specimen and sent one aliquot to the laboratory under paraffin and another in a sealed 5-ml plastic syringe. In another experiment we evaluated the stability of urine pH measurement in a clinical setting. Urine collected under paraffin was tested immediately for pH; an aliquot from the same specimen was stored in a capped 5-ml syringe at 4 degrees C and tested after 24 h. We found no appreciable difference in measured pH between samples sent to the laboratory under paraffin or in a capped plastic syringe.

Journal Title

Pediatric nephrology (Berlin, Germany)

Volume

19

Issue

2

First Page

169

Last Page

171

MeSH Keywords

Circadian Rhythm; Humans; Hydrogen-Ion Concentration; Paraffin; Protons; Refrigeration; Specimen Handling; Syringes; Urine

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