TY - JOUR ID - 9817 TI - A New Dispersive Liquid-Liquid Microextraction Method Followed by Direct GF-AAS Determination Optimized with Experimental Design and Response Surface Methodology for Determination of Ag(I) in Water Samples JO - Analytical and Bioanalytical Chemistry Research JA - ABCR LA - en SN - AU - Ghiasvand, Alireza AU - Shadabi, Shahriar AU - Hajipour, Somayeh AU - Nasirian, Afagh AD - Department of Chemistry, Lorestan University, Khoramabad, Iran AD - 1-Department of Chemistry, Lorestan University, Khoramabad, Iran 2-Department of Chemistry, Faculty of Basic Science, Islamic Azad University, Shahreza, Iran Y1 - 2015 PY - 2015 VL - 2 IS - 1 SP - 60 EP - 71 KW - Silver KW - Dispersive liquid-liquid microextraction KW - GF-AAS KW - Experimental Design KW - Response Surface Methodology DO - 10.22036/abcr.2015.9817 N2 - In this research, a rapid, reliable and selective dispersive liquid-liquid microextraction (DLLME) followed by direct injection of microdroplet to graphite furnace atomic absorption spectrometry (GF-AAS) method for the determination of ultra-trace amounts of Ag(I) was developed. Effect of the important experimental parameters on the extraction efficiency of Ag(I) was investigated using response surface methodology (RSM) by performing a central composite design (CCD). A newly synthesized Calixarene (mesotetraspirocyclohexylcalix[4]pyrrole, TSCC4P) was utilized as the chelating agent. The optimal experimental condition was obtained as sample volume: 5 ml, dispersive solvent type: methanol, dispersive solvent volume: 715 μl, extracting solvent: 1,2-dichlorobenzene, volume of extracting solvent: 25 µl, amount of TSCC4P: 127.1 µg, and pH of sample solution: 6.5. Under the optimum conditions Ag(I) ions were extracted into a fine sedimented microdroplet, which 10 µl of it was directly injected into GF-AAS system. The calibration graph was linear over the range of 0.1-10.0 ng ml-1 with a detection limit (S/N = 3) of 0.02 ng ml-1. The relative standard deviation (RSD%) for ten replicated determinations of 10 ng ml-1 Ag(I) was 3.1%. The enrichment factor and extraction recovery were found to be 292 and 96%, respectively. The proposed DLLME-GF-AAS method was successfully applied to the extraction and determination of Ag(I) ions in different real water samples. UR - https://www.analchemres.org/article_9817.html L1 - https://www.analchemres.org/article_9817_7d34c0a103f8a303efb9c637c0f04195.pdf ER -