Mercury, Urine MERCU
|Method(s)||Inductively Coupled Plasma/Mass Spectrometry|
|Collect||24-hour or random urine collection. Specimen must be collected in a plastic container and should be refrigerated during collection. Studies indicate that refrigeration of urine alone during and after collection, preserves specimens adequately if tested within 14 days of collection.|
|Transport||8 mL aliquot from a well-mixed 24 hour or random collection at 2-8ºC. (Min: 5 mL) Submit specimen in two trace element-free transport tubes.|
Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 1 year
Mercury is volatile; concentration may reduce after seven days or more storage.
|Unacceptable Conditions||Urine collected within 48 hours after administration of a gadolinium (Gd) containing contrast media (may occur with MRI studies). Acid preserved urine.|
Record total volume and collection time interval on transport tube and on test request form. High concentrations of iodine may interfere with elemental testing. Abstinence from iodine-containing medications or contrast agents for at least 1 month prior to collecting specimens is recommended.
Patient prep: Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, and non-essential over-the-counter medications (upon the advice of their physician), and avoid shellfish and seafood for 48 to 72 hours. High concentrations of iodine may interfere with elemental testing. Collection of urine specimens from patients receiving iodinated or gadolinium-based contrast media should be avoided for a minimum of 72 hours post-exposure. Collection from patients with impaired kidney function should be avoided for a minimum of 14 days post-contrast media exposure.
|Preferred Specimen Collection Device(s)|