Catecholamine Fractionation, Free, 24 Hour, Urine
Method Description Describes how the test is performed and provides a method-specific reference
A 1 mL aliquot of a 24-hour urine collection preserved in acid is absorbed on aluminum oxide at an alkaline pH and eluted with acid. An aliquot of the eluate is injected onto a high-performance reverse-phase paired ion-chromatography column where the catecholamines are resolved into individual components. The catechol is oxidized electronically to an O-quinone. The current generated at the detector is converted by amplifier to a voltage signal and an XY recording is generated.(Jiang NS, Machacek D: Measurement of catecholamines in blood and urine by liquid chromatography with amperometric detection. In Progress in HPLC. Vol 2. Edited by Parvez. VNU Science Press, 1987, pp 397-426; Moyer TP, Jiang NS, Tyce GM, Sheps SG: Analysis for urinary catecholamines by liquid chromatography with amperometric detection: methodology and clinical interpretation of results. Clin Chem 1979;25:256-263)
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; 8 a.m.