title: Using a new ligand for solid phase extraction of mercury.
abstract: The octadecyl silica cartridge as a sorbent and 4-bp db (1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene) as a ligand is a simple, rapid and reliable method for extracting and preconcentrating of Hg(II) in real samples prior to cold vapor atomic absorption spectrometry. Sample solutions were passed through a column at pH 4.5 then retained mercury ions on the column were eluted with minimal amount of 0.01 M nitric acid with 3 mL min(-1) flow rate. The effect of pH, type of buffer, flow rate of sample and eluent, type and volume of the eluent were investigated and optimized. At optimum effective parameters, concentration factor and detection limit were achieved 128 and 1.87 ng L(-1), respectively.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Imam Khomeini International University, Qazvin, Iran. m-soleimani@hotmail.com
authors.forename: Majid
authors.initials: M
authors.lastname: Soleimani
authors.forename: Mohamad Saleh
authors.initials: MS
authors.lastname: Mahmodi
authors.forename: Ali
authors.initials: A
authors.lastname: Morsali
authors.forename: Azam
authors.initials: A
authors.lastname: Khani
authors.forename: Majid Ghahraman
authors.initials: MG
authors.lastname: Afshar
mesh_terms: D000327:Adsorption; D002070:Butadienes; D008024:Ligands; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis / Q000302:isolation & purification*; D012822:Silicon Dioxide; D052616:Solid Phase Extraction / Q000379:methods*; D013054:Spectrophotometry, Atomic / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification
chemical_list: D002070:Butadienes; D008024:Ligands; D014874:Water Pollutants, Chemical; C026679:octadecylsilica; D012822:Silicon Dioxide; D008628:Mercury; C031763:1,3-butadiene