Kalliomäki P L, Kalliomăki K K, Aittoniemi K, Korhonen O S
Scand J Work Environ Health. 1983 Apr;9(2 Spec No):219-22. doi: 10.5271/sjweh.2421.
Nearly all metal dusts contain iron, which is one of the most common constituents in steel. Iron has one common ferrimagnetic oxide, magnetite. Although it is considered nontoxic, magnetite can be used as a tracer for more active and pathogenic constituents of inhaled dusts. After the chest area has been magnetized, magnetite produces a weak remanent magnetic field around the body. The field is measured and the amount of dust in the lungs is calculated on the assumption that the composition of lung dust is the same as that of airborne dust. This method has been applied to shipyard and stainless steel welders, to iron and steel workers, to stainless grinders, and to foundry workers. A clear magnetic signal was found for each subject. The maximum amount of lung dust found thus far was 10 g in the lungs of a stainless steel electrode welder. Referents showed signals of 0.5 mg magnetite or less.
几乎所有金属粉尘都含铁，铁是钢铁中最常见的成分之一。铁有一种常见的亚铁磁性氧化物——磁铁矿。尽管磁铁矿被认为无毒，但它可作为吸入粉尘中更具活性和致病性成分的示踪剂。胸部区域被磁化后，磁铁矿会在身体周围产生微弱的剩余磁场。测量该磁场，并在假设肺尘成分与空气传播粉尘成分相同的前提下计算肺部粉尘量。该方法已应用于造船厂工人、不锈钢焊工、钢铁工人、不锈钢研磨工和铸造工人。每个受试者都发现了清晰的磁信号。迄今为止，在一名不锈钢焊条焊工的肺部发现的肺尘最大量为10克。对照者的信号显示磁铁矿含量为0.5毫克或更少。
