Method Description Describes how the test is performed and provides a method-specific reference
Serum is extracted with petroleum ether. The extract is chromatographed and the distinctive peaks of the coumarins are identified and quantitated in the ultraviolet spectrum.(O'Reilly RA, Aggeler PM, Hoag MS, Leong L: Studies on the coumarin anticoagulant drugs: the assay of warfarin and its biologic application. Thromb Diath Haemorrh 1962;8:82-95; Fishwick FB, Taylor A: The determination of warfarin in animal relicta. Analyst 1967;92:192-195)
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.
Wednesday; 9:00 a.m.