title: Determination of iron (III) in food, biological and environmental samples.
abstract: The nanodrop spectrophotometric (NDS) determination of iron (III) in water samples has been established. The proposed method is simple, selective and highly sensitive. The extraction of Fe (III)-thiocyanate complex was done by novel organic reagents such as N-phenylacetamide, N-alkylacetamide, (alkyl=butyl, hexyl and octyl group) in chloroform. The Fe (III) extract was examined in the strong acidic (HCl+H2SO4) solution. The maximum value of molar absorptivity was found to be 1.8×105Lmol-1cm-1at λmax, 477nm (⩾9 fold enrichments) for N-octylacetamide (N-OAA). The method obeys the Beers Law within the range of 0.05μgmL-1-6.0μgmL-1. The detection limit and RSD value of the method were found to be 5ppb and 0.5906% respectively. The correlation coefficient, slope and intercept were calculated and found to be 0.9989, 0.1112, and 0.0048, respectively. The proposed method was successfully applied to the determination of trace amount of iron (III) in food, biological and environmental samples.
authors.affiliation: Department of Chemistry, National Institute of Technology, Raipur, CG 492010, India.
authors.forename: Chitra
authors.initials: C
authors.lastname: Verma
authors.affiliation: Department of Chemistry, National Institute of Technology, Raipur, CG 492010, India. Electronic address: akavita9@rediffmail.com.
authors.forename: Kavita
authors.initials: K
authors.lastname: Tapadia
authors.affiliation: Department of Chemical Engg., National Institute of Technology, Raipur, CG 492010, India.
authors.forename: Anupam Bala
authors.initials: AB
authors.lastname: Soni
mesh_terms: D005504:Food Analysis / Q000379:methods*; D007501:Iron / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D007501:Iron
keywords: Fe (III)-thiocyanate complex; N-Octylacetamide; Water sample