147 research outputs found
Conflict of Laws--Domestic Relations--Jurisdiction to Award Custody Where Child is Temporarily Outside State (Graham v. Graham, 80 A.2d 829 (Pa. 1951))
A new method for separation and preconcentration of trace amounts of Cu(II), Ni(II), Pb(II), Cd(II) and Mn(II) ions in various matrices was proposed. The method is based on the adsorption and chelation of the metal ions on a column containing Amberlite XAD-1180 resin impregnated with 1-(2-thiazolylazo)-2-naphthol (TAN) reagent prior to their determination by flame atomic absorption spectrometry (FAAS). The effect of pH, type, concentration and volume of eluent, sample volume, flow rates of sample and elution solutions, and interfering ions have been investigated. The optimum pH for simultaneous retention of all the metal ions was 9. Eluent for quantitative elution was 20 ml of 2 mol l(-1) HNO(3.) The optimum sample and eluent flow rates were found as 4 ml min(-1), and also sample volume was 500 ml, except for Mn (87% recovery). The sorption capacity of the resin was found to be 0.77, 0.41, 0.57, and 0.30 mg g(-1) for Cu(II), Ni(II), Cd(II), and Mn(II), respectively. The preconcentration factor of the method was 200 for Cu(II), 150 for Pb(II), 100 for Cd(II) and Ni(II), and 50 for Mn(II). The recovery values for all of the metal ions were a parts per thousand yen95% and relative standard deviations (RSDs) were a parts per thousand currency sign5.1%. The detection limit values were in the range of 0.03 and 1.19 mu g l(-1). The accuracy of the method was confirmed by analysing the certified reference materials (TMDA 54.4 fortified lake water and GBW 07605 tea samples) and the recovery studies. This procedure was applied to the determination of Cu(II), Ni(II), Pb(II), Cd(II) and Mn(II) in waste water and lake water samples
Amberlite XAD-1180/Salisilaldoksim Şelat Yapıcı Reçinesinin Sentezi ve Bazı Eser Metal İyonlarının Zenginleştirilerek FAAS ile Tayini
Şelat Yapıcı Reçine İle Bazı Eser Metallerin Ayırma/Ön-Deriştirme Sonrası Alevli AAS ile Tayini
Birlikte Çöktürme Yöntemi ile Su ve Gıda Örneklerindeki Bazı Eser Metallerin Zenginleştirilmesi ve FAAS ile Tayini
Yeni Bir Şelat Yapıcı Reçine Sentezi, Karakterizasyonu ve Bazı Ağır Metal İyonlarının Katı Faz Ekstraksiyonu ile Zenginleştirme Sonrası Alevli AAS ile Tayini
Bazı Eser Metal İyonlarının Katı Faz Ekstraksiyonu İle Ayrılması/Zenginleştirilmesi Ve AAS İle Tayini
Cu(II) ve Ni(II) Salisilaldoksim İle Birlikte Çöktürme Sonrası FAAS ile Su Örneklerindeki Bazı Eser Metallerin Tayini
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