Web of Science (Emerging Sources Citation Index)

Document Type: Original Research Article

Authors

1 Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University, Arak Iran

2 Department of Chemistry, Faculty of Science, Islamic Azad University, Arak Iran

3 Department of Chemistry, Faculty of Science Islamic Azad University, Arak Branch, Arak, Iran

Abstract

A novel, rapid, simple and sensitive syringe-to-syringe-dispersive liquid–phase micro-extraction (SS-DLPME) method followed by flame atomic absorption spectrometry was proposed for pre-concentration and determination of nickel ion in water and herbal samples using 1-(2-pyridylazo)-2-naphthol as a chelating agent. Various experimental factors on pre-concentration and determination of nickel such as pH of sample solution, concentration of the complex agent, volume of the extraction solvent, shooting times, centrifugation time and ionic strength were investigated using Plackett–Burman design for screening and Box-Behnken design as an optimization method. Under optimum conditions, the calibration curve was linear over the range of 10- 875 µg L-1 with the coefficient of determination R2 = 0.997 and the detection limit of 1.800 µg L-1. Relative standard deviation (R.S.D) for 8 replicate determinations and the enrichment factor (EF), were 2.050% and 86, respectively. Finally, the proposed method was applied successfully to pre-concentration and determination of the analyte in environmental water and herbal samples

Graphical Abstract

Keywords

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