Cadmium and Lead Concentrations in Blood of Solderers among Autoworkers

자동차공장(自動車工場) 근로자중(勤勞者中) 납땜공의 혈중(血中) 카드미움과 연함량(鉛含量)에 관(關)한 조사연구(調査硏究)

Economic development of Korea brought rapid progress and expansion of her industries. Accordingly, number of workers who have been exposed to hazardous metals are increasing. For better understanding the significance of on the job human metal pollution, a total of 22 solderers among autoworkers and 28 controls among medical students was purposively selected as samples of the study. From their blood, concentrations of cadmium and lead were measured with atomic absorption spectrophotometer, and to compare with statistical indices of controls those of solderers were sumarized as follows. 1. Each frequency distribution of cadmium and lead concentration in blood of solderers was more positively skewed showing non-Gausian distribution. 2. Interindividual variation of lead concentration in blood of solderers was markedly revealed. 3. Each mean of cadmium and lead concentration in blood of solderers was higher than that of controls(Cd;p<0.01, Pb;p<0.01). 4. Relative ratio of cadmium concentration in blood of solderers to that of controls was 1.36 by arithmatic mean and 1.39 by geometric mean. Relative ratio of lead concentration in blood of solderers to that of controls was 1.53 by arithmatic mean and 1.30 by geometric mean. 5. It was shown that concentration of lead is slightly correlated with that of cadmium both in solderers and controls(solderers; p<0.1, controls;p<0.1).

납땜공 22명(名)과 대조군으로서 의과대학생 28(명)名을 대상(對象)으로 혈액(血液)을 $5{\sim}10ml$ 채취하여 Cd, Pb 함량(含量)을 측정(測定)한 후 대조군에 대한 납땜공의 혈중(血中) 함량(含量)의 통계치(統計値)를 비교한 결과는 다음과 같다. 1. 혈중 Cd과 Pb의 분포양상은 대조군과 납땜공 모두 비정규분포를 보이고 있으며, 대조군보다 납땜공에서 좌비대칭(左非對稱)으로 심하게 치우치면서 예리한 봉(峰)을 보이고 있다. 2. 혈중 Cd과 Pb함량의 개체간 변이는 대조군과 납땜공 모두 심하였으며, 특히 Pb의 경우 대조군보다 남땜공에 서 심하였다. 3. 대조군에 대한 납땜공의 혈중 Cd과 Pb 함량의 평균치는 Cd과 Pb의 경우 각각 통계적으로 유의했다(Cd; p<0.01, Pb; p<0.01). 4. 혈중 Cd 함량의 상대비는 산술평균으로 1.36배(倍), 기하평균으로 1.39배(倍)였다. 헐중 Pb 함량의 상대비는 산술평균으로 1.53배(倍), 기하평균으로 1.30배(倍)였다. 5. 혈중 Cd과 Pb 함량사이의 상관관계는 대조군과 납땜공에서 각각(各各) 통계적으로 유의했다(controls; p<0.1, solderers; p<0.1).