Nickel determination in saline matrices by ICP-AES after sorption on Amberlite XAD-2 loaded with PAN
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Nickel determination in saline matrices by ICP-AES after sorption on Amberlite XAD-2 loaded with PAN.
In the present paper, a solid phase extraction system for separation and preconcentration of nickel (ng g(-1)) in saline matrices is proposed. It is based on the adsorption of nickel(II) ions onto an Amberlite XAD-2 resin loaded with 1-(2-pyridylazo)-2-naphthol (PAN) reagent. Parameters such as the pH effect on the nickel extraction, the effect of flow rate and sample volume on the extraction, ...
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Four chelating matrices prepared by coupling Amberlite XAD-2 with chromotropic acid (AXAD-2-CA or 1), pyrocatechol (AXAD-2-PC or 2) and thiosalicylic acid (AXAD-2-TSA or 3) through azo spacer and impregnation of Amberlite XAD-7 with xylenol orange (AXAD-7-XO or 4) have been studied for enrichment of lead(II). All the four resins quantitatively sorb Pb(II) at pH 3.0-8.0 when the flow rate is mai...
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ژورنال
عنوان ژورنال: Talanta
سال: 1999
ISSN: 0039-9140
DOI: 10.1016/s0039-9140(98)00339-7