This study aims at investigating the relationships between the urinary mercury concentration and blood zinc-protoportphyrin, serum cholinestrase activity, making 149 workers exposed to mercury vapor and 68 workers who were not exposed to mercury among the workers in a flurorescent lamp manufactureing factory an object of this investigation. The results are as follows ;
1. In an exposed group, the number of those whose urinary mercury concentration showed over 1.00 ㎍/ℓ was 21 persons (14.3%) among 147 workers. The average urinary mercury concentration was 52.1±146.1 ㎍/ℓ(1.8-361.2 ㎍/ℓ), which proved to be higher than the average concentration in a control group.
2. In an exposed group, the average concentration of blood zinc-protoporphyrin was 27.8±12.5 ㎍/㎗ (12.2-101.5㎍/㎗), which proved to be somewhat higher than the average concentration in a control group. But it slid not show a significant difference.
3. In an exposed group, the average concentration of serum cholinesterase activity showed 1936.7±341.01U/ℓ (1,120.0-2,875.0IU/1), which proved to be lower than the average concentration in a control group.
4. The relational coefficient between urinary mercury concentration and blool zinc-protoporphyrin, serum cholinesterase activity of the whole workers exposed to mercury showed little difference. While the relational coefficient between the urinary mercury concentration and blood zinc-protoporphyrin of the workers whose urinary mercury concentration showed over 100 ㎍/ℓ was relatively high, which was 0.62.
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