Arsenic Fractionation, Random, Urine
Method Description Describes how the test is performed and provides a method-specific reference
Inorganic arsenic, monomethylarsonic acid (MMA), and cacodylic acid (dimethyl arsinic acid, [DMA]) in urine correlate with nondietary (toxic) exposure to arsenic, while arsenobetaine and arsenocholine in urine represent dietary (seafood) exposure and are of little or no significance. Arsenic acid, arsonic acid, MMA, and DMA are reduced and complexed in the presence of strong hydrochloric acid and potassium iodide and the resulting compounds extracted with toluene as iodine complexes, while nontoxic, organic arsenobetaine and arsenocholine remain in the organic fraction and are discarded. Arsenic in the extract is determined by inductively coupled plasma-mass spectrometry (ICP-MS) according to the standard operating procedure for urine total arsenic determinations.(Nixon DE, Moyer TP: Routine clinical determination of lead, arsenic, cadmium, and thallium in urine and whole blood by inductively coupled plasma mass spectrometry. Spectrochimica Acta B 1996;51:13-25)
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 Friday; 11 a.m.