OAU - Performance: Organic Acids Screen, Urine

Test Catalog

Test Name

Test ID: OAU    
Organic Acids Screen, Urine

Method Description Describes how the test is performed and provides a method-specific reference

A urine volume corresponding to 0.25 mg of creatinine is acidified, then extracted with ethyl acetate. After separation and evaporation of the solvent phase, the dry residue is sialylated and analyzed by capillary gas chromatography-mass spectrometry. When indicated, oxidation of 2-keto acids is performed by reaction with hydroxylamine hydrate.(Sweetman L: Organic acid analysis. In Techniques in Diagnostic Human Biochemical Genetics. Edited by FA Hommes. Wiley-Liss, New York, 1991, pp 143-176; Hoffman GF, Feyh P: Organic acid analysis. In Physician's Guide to the Laboratory Diagnosis of Metabolic Diseases. Edited by N Blau, M Duran, ME Blaskovics KM Gibson. Berlin, NY, Springer, 2003, pp 27-44)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.

Monday through Saturday; 7 a.m.

Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

3 days (not reported on Sunday)

Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result

6 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

2 months

Performing Laboratory Location The location of the laboratory that performs the test