Molybdenum/Creatinine Ratio, Urine
Method Description Describes how the test is performed and provides a method-specific reference
Molybdenum in urine is analyzed by inductively coupled plasma-mass spectrometry (ICP-MS). Aqueous acidic calibrating standards, reagent blanks, quality control specimens, and patient sample digests are diluted with aqueous acidic diluent containing internal standards. These diluted samples are aspirated by a pneumatic high-pressure nebulizer driven by argon gas and directed into a high-temperature (6800 K) argon gas discharge (plasma). This discharge decomposes, atomizes, and ionizes the nebulized particles. All atoms, molecules, and ions formed in the discharge are extracted into a mass spectrometer through a platinum orifice. Molybdenum ions are separated from the concomitants by the quadrupole-mass spectrometer. Instrument detector signals from the molybdenum ions are directly proportional to the concentration in the sample.(Unpublished Mayo method)
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.
Thursday; 11 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.
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Performing Laboratory Location The location of the laboratory that performs the test