Abstract
The possibility to use 4-(2-pyridylazo)resorcinol (PAR) and 1-(2-pyridylazo)-2-naphthol (PAN) for manganese(II) concentrating by the
micellar extraction at cloud point (CP) temperature and subsequent atomic absorption spectrometry (AAS) determination was investigated.
Under the optimum conditions, preconcentration of 100 ml of water sample in the presence of 1% non-ionic surfactant (NS) OP-7, 1×10−4 M
1-(2-pyridylazo)-2-naphthol permitted the detection 5g l−1 manganese. The proposed method has been applied to the AAS determination
of manganese in water samples after cloud point extraction