Abstract
A nebulizer for the hydride generation atomic‐absorption spectrophotometry of As and Se, and Hg vapor generation is described, in which the gas flow, the reductant, and the sample are connected separately through three concentric channels. The sample and the reducing agent flow separately till they reach the air flow. The generated species are then mixed with the air carrier gas and transported into the flame of an AA spectrometer. Optimization of flame type, acid, and reductant concentrations was carried out. Interference of transition metals on the analytes' signals was minimized using EDTA. Good linear analytical range and short term stability are obtained.
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