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Zinc Protoporphyrin

Item Value
Approval req'd? No
Available Stat? No
Test code ZNPP
Performed by ARUP
Sendout? Yes
Method Quantitative Hematofluorometry
Collection Instructions Wrap tube in aluminum foil to protect from light.
Container type Lavender top
Amount to Collect 1 mL blood
Sample type EDTA whole blood
Preferred volume 1 mL blood
Min. Volume 0.2 mL blood
Processing notes Refrigerate sample and send specimen refrigerated, ARUP test code 0020605.
Ref Lab Rejection Criteria Frozen, clotted or hemolyzed sample.
Units µmol ZPP/mol Hem
Normal range 0-69 µmol ZPP/mol Hem

Refer to current OSHA regulations for exposure criteria.
Synonyms FEP; Free Erythrocyte Protoporphyrin
Turn around times 3 - 5 days
Additional information To convert µg/dL to µmol/L (SI units) multiply by 0.0160. This test measures total porphyrin, of which 95% is free. It is insensitive and a nonspecific test for lead poisoning, and should not be used to screen for that condition, because it is rarely abnormal at the low levels now considered hazardous for children. This test is also unsuitable for monitoring acute intermittent porphyria.

Zinc Protoporphyrin (ZPP) testing is used for workplace compliance with the Occupational Safety and Health Administration, Medical Surveillance Guidelines to monitor workers for chronic lead poisoning. The test name, laboratory reference range for lead workers, and units of measure (mcg ZPP/dL blood) are in accordance with the OSHA guidelines (US Dept. of Labor, Occupational Safety and Health Administration, Standards-29 CFR, Medical Surveillance Guidelines, 1926.62 App C
CPT coding 84202-90
LOINC code 2895-1
Last Updated 11/29/2016 11:22:36 AM
Entry Number 962
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