title: Simultaneous preconcentrations of Co(2+), Cr(6+), Hg(2+) and Pb(2+) ions by Bacillus altitudinis immobilized nanodiamond prior to their determinations in food samples by ICP-OES.
abstract: A novel solid phase extraction method was developed for simultaneous preconcentration-separation of Co(2+), Cr(6+), Hg(2+) and Pb(2+) ions prior to their determinations in food samples by ICP-OES. Thermophilic Bacillus altitudinis immobilized nanodiamond was used as a new biosorbent. SEM and FT-IR analysis were studied to characterize the biosorbent. The optimum pH values of quantitative biosorption for Co(2+), Cr(6+), Hg(2+) and Pb(2+) were found to be 5.0, 6.0, 6.0 and 6.0, respectively. A flow rate of 3.0mLmin(-1) was selected as optimum for all metal ions. 5mL of 1mol/L HCl was used as eluent. Preconcentration factor was achieved as 80. LODs were calculated as 0.071, 0.023, 0.016 and 0.034ngmL(-1), respectively for Hg(2+), Co(2+), Cr(6+) and Pb(2+). The biosorption capacities were calculated for Co(2+), Cr(6+), Hg(2+) and Pb(2+) as 26.4, 30.4, 19.5, and 35.2mg/g, respectively. The developed method was successfully applied to food samples to determine analyte concentrations.
authors.affiliation: Department of Biology, Faculty of Art and Science, Siirt University, 56100 Siirt, Turkey. Electronic address: sadin77@hotmail.com.
authors.forename: Sadin
authors.initials: S
authors.lastname: Ozdemir
authors.affiliation: Health Services Vocational High School, Medical Marketing and Promotion Programme, Mardin Artuklu University, 47200 Mardin, Turkey. Electronic address: kilincersin@gmail.com.
authors.forename: Ersin
authors.initials: E
authors.lastname: Kilinc
authors.affiliation: Faculty of Art and Science, Department of Chemistry, Batman University, Batman, Turkey.
authors.forename: Kadir Serdar
authors.initials: KS
authors.lastname: Celik
authors.affiliation: Department of Biology, Faculty of Art and Science, Siirt University, 56100 Siirt, Turkey.
authors.forename: Veysi
authors.initials: V
authors.lastname: Okumus
authors.affiliation: Erciyes University, Department of Chemistry, Faculty of Science, TR-38039 Kayseri, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Soylak
mesh_terms: D001407:Bacillus / Q000737:chemistry*; D007477:Ions / Q000737:chemistry*; D058612:Nanodiamonds / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D007477:Ions; D058612:Nanodiamonds
keywords: Bacillus altitudinis; Co(2+); Cr(6+); Hg(2+); Nanodiamond; Pb(2+); Preconcentration