Preconcentration and determination of lead on Amberlite XAD-4/ 4-(2- pyridylazo) resorcinol by flame atomic absorption spectrometryabsorption spectrometry
Preconcentration and determination of lead on Amberlite XAD-4/ 4-(2- pyridylazo) resorcinol by flameatomic absorption spectrometryabsorption spectrometry