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Labcorp Oklahoma, Inc.
Test Directory


Zinc, Serum or Plasma

Order Name ZINC
Test Number: 3603800
Revision Date 10/04/2022
Test Name Methodology LOINC Code
Zinc, Serum or Plasma
Inductively-Coupled Plasma/Mass Spectrometry  
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2 mL (0.5) Serum Royal Blue - No Additive Clot (Trace Element Free) Ambient / Refrigerated
Alternate 1 2 mL (0.5) Plasma Royal Blue - EDTA (Trace Element Free) Ambient / Refrigerated
Instructions Due to nationwide shortages of some phlebotomy tubes specified for trace element testing, ARUP Laboratories is currently accepting red top (serum) and lavender (EDTA) tubes as alternative collection tubes. Serum and Plasma MUST be removed from the cells within 2 hours of collection and placed in an ARUP Laboratories "Trace-element" pour off tube.

Diet, medication, and nutritional supplements may introduce interfering substances. Upon the advice of their physician, patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, and nonessential over-the-counter medications for one week prior to sample draw.
Allow 20-30min for Serum to clot.
Centrifuge specimen and pour off serum or plasma into an Trace Element-Free Transport Tube ASAP within 2 hours of collection.

Specimens can be transported either Refrigerated or Ambient Temperature.
Please Indicate Specimen type on Transport Tube.
Unacceptable Specimens: Separator tubes or gels. Hemolyzed specimens.
Stability: Ambient: Indefinitely; Refrigerated: Indefinitely; Frozen: Indefinitely.
Testing Schedule Sun-Sat 
Expected TAT 1-3 Days  
Clinical Use Serum or plasma measurements are best for assessment of deficiency over short periods of time. For acute toxicity, zinc in urine may be a more reliable indicator of exposure. 
Notes Reference Lab: ARUP
Test Code: 20097
Click Here to view information on the ARUP website
CPT Code(s) 84630
Lab Section Reference Lab