Application of Microfunnel Magnetic Stirring Assisted Liquid-Liquid Micro-extraction Method for Pre-concentration and Determination of Silver Ion in Water Samples

In this research, a highly sensitive, selective, rapid and simple micro-funnel magnetic stirringassistedliquid–liquid microextraction (mf-msa-llme) method combined with flame atomicabsorption spectrometry (faas) was introduced for the preconcentration, extraction, andmeasurement of trace amounts of silver ion. in this method 1-(2–pyridylazo)-2-naphthol (pan) and1-octanol were used as chelating agent and extraction solvent. effective parameters on extractionefficiency such as ph of sample solution, type and volume of extraction solvent, amount of ligand,extraction time, and ion strength were investigated and optimized. under the optimum conditions,calibration curve was linear in the range of 2-250 μg l^-1 with correlation of coefficient r^2=0.997.detection limit, relative standard deviation and the enrichment factor were 0.251 μg l^-1, 4% (n=7,c=80 μg l^-1) and 135, respectively. the proposed procedure was successfully applied for thepreconcentration and determination of trace amount of silver in water samples with good accuracyand good validity.