Journal
ANALYTICAL METHODS
Volume 8, Issue 27, Pages 5519-5525Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ay01277a
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Zinc metal is an essential micronutrient which is required for different biological and physiological processes in humans, animals and plants. Here, a simple, rapid and sensitive method for the determination of zinc in environmental water samples using surfactant-assisted dispersive liquid-liquid micro-extraction (SA-DLLME) prior to flame atomic absorption spectrometry (FAAS) analysis has been reported. This method involved the formation of a zinc complex with 4-(2-pyridylazo) resorcinol (PAR) and subsequently SA-DLLME was applied to extract the Zn(II)-(PAR)(2)center dot CPC complex into chloroform in the presence of a cationic surfactant. Optimum extraction of the complex was observed when the concentration of cetylpyridinium chloride (CPC) and PAR was 0.1% for both at pH 9.0 and with an extraction time of 10 min. The calibration curve was found to be linear over the range of 1.5-60 mu g L-1 with a correlation of estimation (r(2)) of 0.997. This optimized method has been successfully applied for the determination of zinc in environmental water (tap, river and well) samples.
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