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Acid Enhancement of Zinc and Lead Atomic Absorption Signals
Volume 28, Number 6 (Dec. 1974) Page 585-587
Brachaczek, Wanda W.; Butler, James W.; Pierson, William R.
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.