鍊 取f及 動勞者의 暴露 水準및 血中 Zinc Protoporphyrin 灌度

Level of Lead in Air and Blood Zinc Protoporphyrin of W or kers in Lead Plants

For the purpose of estimating the working environrnent and the relationship between the airborne lead concentration and the ZPP level in the whole blood of the workers, the airborne lead concentrations and the ZPP level were measured at the 26 plants which deal with lead, from October 5 to November 5 in 1988. Analysis of the airborne lead concentration was performed by NIOSH Method 7082, and the ZPP level was measured by a hematofluorometer. The following results are concluded. 1. The average airborne lead concentration of the lead battery manufactures is 0.025rng/m3 and that of the secondary lead smelters is 0.023mg/m3&#8226; There were no significant differences between industry(p)O. l) 2. At the lead battery manufacture, the process of lead powder production showed the highest concentration of 0.034mg/m3, but there were no significant differences among the processes (p)O.n. At the secondary lead smelter, the process of dismant1ing waste batteries showed the highest concentration 0.141mg/m3, and there were very significant differences among the processes (p<0.OO5). 3. The ZPP level in the whole blood showed significant differences between industry (p<O. lO). The average ZPP level of the lead battery manufactures is 133.0 :t 106.3μg/100rnl and that of the secondary lead smelters is 149.6 :t 110.9μ.g/l00 rnl. 4. The correlation coefficients between the airborne lead concantration and ZPP level were O. 426 (p<O.OOl) for the lead battery manufactures and 0.484 (p<O.OOl) for the secondary lead smelters. The correlation coefficients between the work duration (in months) and the ZPP level were 0.238 (p<O.OOl) for the lead battery mannfactures and 0.075 (p)0.10) for the sec ondary lead smelters. 5. The Iinear regression equation, with the airborne lead concentration as an independent vari able and the ZPP level as a dependent variable, is Y=96.84+1300.34X (r=0.448, p<O.OO1) for the 26 plants which deal with lead. The Iinear regression equation, with the work duration(inmonths) as an independent variable and the ZPP level as a dependent variable, is Y=127.28+0.49X (r=0.162, p<0.05) 6. The correlation coefficients between the amolmt of inhaled lead and ZPP level were 0.349 (p<0.001) for the lead battery manufactures and 0.318 (p<O.OOl) for the secondary lead smeltes. The linear regression equation for the 26 plants surveyed, with the amount of inhaled lead as an independent variable and ZPP level as a dependent variable, is Y=123.63+18.82X (r=O.5， p<O.ool).