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Monitoring of zinc protoporphyrin levels in blood following occupational lead exposure
Author(s) -
Wildt Karl,
Berlin Maths,
Isberg Per Erik
Publication year - 1987
Publication title -
american journal of industrial medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 104
eISSN - 1097-0274
pISSN - 0271-3586
DOI - 10.1002/ajim.4700120404
Subject(s) - zinc protoporphyrin , medicine , lead poisoning , occupational exposure , hemoglobin , physiology , iron deficiency , protoporphyrin , anemia , toxicology , environmental health , heme , biochemistry , chemistry , porphyrin , photochemistry , psychiatry , biology , enzyme
The value of measurements of zinc protoporphyrin in blood (ZPP) in the surveillance of workers occupationally exposed to lead has been studied. From a group of referents, consisting of 1,088 men and 511 women, it has been established that the normal mean ZPP is in the region of 25 μg/100 ml, and only rarely do values exceed 45 μg/100 ml. The higher ZPP values are frequently associated with low blood hemoglobin concentrations and appear to be manifestations of an iron‐deficiency anemia. Women have higher ZPP values than men; smoking has no influence. Measurements of ZPP and blood lead concentration (PbB) have been made every other month for 2.5 years on a group of around 200 men and 40 women exposed to lead in a storage battery factory. The mean ZPP of the group throughout the period was 70.9 μg/100 ml blood, and a linear relation between log ZPP and PbB in the PbB range of 10‐80 μg/100 ml has been established. ZPP thresholds in the control of excessive occupational lead exposure, and the economic advantage of ZPP measurements over PbB, are discussed.