Test Catalog

Test ID: ACRNS    
Acylcarnitines, Quantitative, Serum

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

To 20 mcL of serum, 6 internal standards of known concentration (d3-acetylcarnitine, d3-propionylcarnitine, d7-butyrylcarnitine, d3-octanoylcarnitine, d3-dodecanoylcarnitine, and d3-palmitoyl-carnitine) and acetonitrile for deproteinization are added. Following shaking for 30 minutes and centrifugation, the supernate is dried and then treated with n-butanolic HCl yielding the acylcarnitines, which are analyzed as their n-butylesters by electrospray ionization tandem mass spectrometry. The concentrations of the analytes are established by computerized comparison of these analytes' ion intensities to those of the closest internal standard.(Van Hove JL, Kahler SG, Feezor MD, et al: Acylcarnitines in plasma and blood spots of patients with long-chain 3-hydroxyacylcoenzyme A dehydrogenase deficiency. J Inherit Metab Dis. 2000;23:571-582)

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, Wednesday, Thursday, Friday; 8 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.

2 days (not reported on Sunday)

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

5 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 Indicates the location of the laboratory that performs the test