title: Flame atomic absorption determination of manganese(II) in natural water after cloud point extraction.
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 100ml of water sample in the presence of 1% non-ionic surfactant (NS) OP-7, 1x10(-4)M 1-(2-pyridylazo)-2-naphthol permitted the detection 5mugl(-1) manganese. The proposed method has been applied to the AAS determination of manganese in water samples after cloud point extraction.
authors.affiliation: Analytical Chemistry Department, Taras Shevchenko Kyiv University, Volodymyrska Str. 64, Kyiv 01033, Ukraine.
authors.forename: V O
authors.initials: VO
authors.lastname: Doroschuk
authors.forename: S O
authors.initials: SO
authors.lastname: Lelyushok
authors.forename: V B
authors.initials: VB
authors.lastname: Ishchenko
authors.forename: S A
authors.initials: SA
authors.lastname: Kulichenko