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用原子吸收法对大气降尘中可溶性锰、锌进行了测定,并用正交设计法对共存元素铁、铝、钙进行干扰实验。通过实验得知,3～1Omg/l铁、2～8mg/l铝、2～8mg/l钙均无干扰;锌、锰的灵敏度分别为O.02μg/ml、O.05μg/ml,变异系数分别为3.01％、1.29％;线性范围分别为0.00～0.70μg/ml、0.00～3.00μg/ml。测定方法简便,适合于环境监测。
The atomic absorption method was used to determine the soluble manganese and zinc in the dustfall of the atmosphere. The interference experiments of iron, aluminum and calcium were carried out by orthogonal design method. The results showed that there was no interference between 3 ~ 1Omg / l iron, 2 ~ 8mg / l aluminum and 2 ~ 8mg / l calcium. The sensitivity of zinc and manganese were0.02μg / ml and0.05μg / ml, Respectively, 3.01%, 1.29%; linear range of 0.00 ~ 0.70μg / ml, 0.00 ~ 3.00μg / ml. Measurement method is simple, suitable for environmental monitoring.