Aldosterone with Sodium, 24 Hour, Urine
Method Description Describes how the test is performed and provides a method-specific reference
Sodium is performed by flame emission spectrometry/indirect ion-selective electrode (ISE).
Aldosterone is performed by liquid chromatography-tandem mass spectrometry (LC-MS/MS).
Samples are spiked with deuterated internal standard and are hydrolyzed overnight with acid. Samples are then neutralized and extracted by solid phase extraction (SPE). The extracts are dried, reconstituted, and analyzed by LC-MS/MS.(Taylor RL, Singh RJ: Validation of liquid chromatography-tandem mass spectrometry method for analysis of urinary conjugated metanephrine and normetanephrine for screening of pheochromocytoma. Clin Chem 2002 Mar; 48:533-539)
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.
Aldosterone: Monday, Thursday; 3 p.m.
Sodium: Monday through Sunday; Continuously