FAAS determination of zinc in water samples after enrichment by coprecipitation with Mn(ll)-5-Br-PADAP

摘要

Flame atomic absorption spectrometry (FAAS) can determinate the contention of Zn(2+) in water samples rapidly. Choosing 2 - (5 - bromo-2-pyridylazo) -5 - diethylaminophenol (5-Br-PADAP) as a precipitating agent, Mn~(2+) as the carrier ion to separate and enrich Zn(2+) in water samples. And studies show that the selected system is affected by acidity, the amount of precipitant concentration, carrier usage and aging time factors. The detection limit is 0.117μg/L.