Abstract

We have been measuring atmospheric particulate Pb and Zn concentrations by atomic absorption. Samples are collected on membrane filters and dissolved in HNO₃-HClO₄ prior to comparison with aqueous standards, using an Instrumentation Laboratories model 153 dual beam dual channel atomic absorption spectrophotometer equipped with background correction, operating with a stoichiometric air-acetylene flame. The absorption lines are 217.0 nm for Pb and 213.9 nm for Zn.

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Vikas Singh Chauhan, Rohit Kumar, Dixith Manchaiah, and Raghavan K. Easwaran
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