This study was carried out to investigate relationship between plasma δ-aminolevulinic acid (ALAP) and lead exposure indices in exposure to lead. The subjects were 218 male workers in 2 storage battery companies and 2 secondary smelting companies. Blood lead(PbB), blood zinc-protoporphyrin(ZPP), urinary δ-aminolevulinic acid (ALAU), hemoglobin(Hb), and hematocrit(Hct) were measured as lead exposure indices.
The results were as follows,
1. The means of blood lead and blood ZPP concentration of subjects were 27.2±14.0㎍/㎗ and 55.1±47.6㎍/㎗, respectively. The means of plasma δ-ALA and urinary δ-ALA concentration were 18.9±25.1㎍/㎗ and 2.1 4.6㎍/ℓ, respectively.
2. The concentration of ALAP was 11.2㎍/ℓ for below 20㎍/㎗ PbB, 12.8㎍/ℓ for from 21-40㎍/㎗ PbB, arld 51.2㎍/ℓ for over 40㎍/㎗ PbB, respectively.
3. ALAP was significantly correlated with ALAU(r=0,82,9, p$lt;0.01), ZPP(r=0.724, p$lt;0.01) and PbB(r=0.552, p$lt;0.01).
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