An inorganic nano-sorbent based on nickel-aluminum-zirconium ternary-layered double hydroxide for solid-phase extraction of chloride ions

作者：Abdolmohammad Zadeh H^*; Rezvani Z; Sadeghi G H; Shamsi A

来源：Journal of the Iranian Chemical Society, 2012, 9(4): 559-568.

DOI：10.1007/s13738-012-0069-4

• Chloride
• Nickel-aluminum-zirconium layered double hydroxide
• Nano-sorbent
• Solid-phase extraction
• Spectrophotometry

A well crystalline nickel-aluminum-zirconium ternary-layered double hydroxide was firstly synthesized and applied as a solid-phase extraction sorbent for the separation of trace levels of chloride ions from aqueous solutions. An indirect method was used for monitoring of the extracted chloride ions. For this purpose, the extracted chloride ions were passed through a reaction column containing silver chloranilate powder and the analyte was precipitated as silver chloride. The concentration of chloranilate ions released from the reaction column, which corresponds to the chloride ions concentration, was then determined spectrophotometrically at 530 nm. The effect of several parameters, such as pH, sample loading flow rate, elution conditions, amount of nano-sorbent, sample volume and effect of potential interfering ions on the recovery was investigated. In the optimum experimental conditions, the limit of detection (3 s) and enrichment factor were 0.12 and 40 mu g mL(-1), respectively. The calibration graph using the pre-concentration system was linear in the range of 0.25-3.00 mu g mL(-1) with a correlation coefficient of 0.997. The validation of the presented method was checked by the analysis of two certified reference materials. The optimized method was successfully applied to the determination of chloride ions in waters, food and biological samples.

• 出版日期2012-8