Matczak W
Zakładu Zagrozeń Chemicznych i Pyłowych Instytut Medycyny Pracy, Lodzi.
Med Pr. 2000;51(1):11-7.
Exposure of MMA/Plasma/Cu welders to fumes and soluble and insoluble Cu was assessed. Mean weighted concentrations of dusts/fumes and copper compounds at the welders' breathing zone were: 3.1 mg/m3 (0.7-7.6 mg/m3) for fumes; 0.08 mg/m3 (0.02-0.17 mg/m3) for soluble Cu; and 0.39 mg/m3 (0.08-0.76 mg/m3) for insoluble Cu. Correlation was found between the concentration of Cu compounds and fume/dust concentrations (r = 0.55 MMA/Plasma/Cu; r = 0.93 MMA/Cu). The mean percentage of copper in fumes/dusts was 17 (9.5-28.5%). Our results show that copper welding may pose a hazard to the welders' health. The index of combined exposure to determined agents was 1.2 (0.3-2.6), including soluble Cu (0.8) and insoluble Cu (0.4). The proportion of respirable fraction of fumes and their components varied between 40-80%. The background concentrations of the components (about 6 times lower than those in the welders' breathing zone) did not exceed the MAC value.
对MMA/等离子/Cu焊工接触烟尘以及可溶和不可溶铜的情况进行了评估。焊工呼吸区域内粉尘/烟尘和铜化合物的平均加权浓度分别为：烟尘3.1毫克/立方米（0.7 - 7.6毫克/立方米）；可溶铜0.08毫克/立方米（0.02 - 0.17毫克/立方米）；不可溶铜0.39毫克/立方米（0.08 - 0.76毫克/立方米）。发现铜化合物浓度与烟尘/粉尘浓度之间存在相关性（MMA/等离子/Cu中r = 0.55；MMA/Cu中r = 0.93）。烟尘/粉尘中铜的平均百分比为17%（9.5 - 28.5%）。我们的结果表明，铜焊接可能对焊工健康构成危害。所测定物质的联合接触指数为1.2（0.3 - 2.6），其中可溶铜为0.8，不可溶铜为0.4。烟尘及其成分的可吸入部分比例在40% - 80%之间变化。各成分的背景浓度（比焊工呼吸区域内的浓度低约6倍）未超过职业接触限值。
