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Solid‐Phase Extraction and Preconcentration of Copper in Mineral Waters with 4‐(2‐Pyridyl‐Azo) Resorcinol‐Loaded Amberlite XAD‐7 and Flame Atomic Absorption Spectrometry
Author(s) -
Ince Muharrem,
Kaplan Olcay,
Yaman Mehmet
Publication year - 2008
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143008x266805
Subject(s) - amberlite , resorcinol , solid phase extraction , copper , chemistry , extraction (chemistry) , atomic absorption spectroscopy , mass spectrometry , nuclear chemistry , absorption (acoustics) , chromatography , materials science , adsorption , organic chemistry , physics , quantum mechanics , composite material
A simple, sensitive, accurate, and selective method for determination of ultratrace levels of copper is modified. The method is based on preconcentration of copper on the 4‐(2‐pyridyl‐azo) resorcinol‐loaded amberlite XAD‐7 (non‐ionic copoly[styrene‐acrylic compound]) at pH 5.0 to 6.5 for contact time as low as 45 minutes. The adsorbed copper was eluted with concentrated nitric acid and measured by flame atomic absorption spectrometry. Recoveries of up to 90% were achieved. The optimized preconcentration method was applied to copper determination in various water samples. The detection limit was found to be 0.09 ng mL −1 . The relative standard deviation was found to be 9% using 300 mL of 5.0 ng mL −1 for 10 replicate preconcentration procedures. Copper concentrations in the studied water samples were found to be in the ranges of 0.4 to 18.0 ng mL −1 .