Determination of iron in drinking water after its flotation concentration by two new dithiocarbamate collectors

Abstract

Two new methods for the determination of iron by atomic absorption spectrometry (AAS) are proposed for drinking water. The determination was made after flotation concentration of Fe by using of two new flotation collectors: lead(II) heptyldithiocarbamate, Pb(HpDTC)2 and cobalt(III) heptyldithiocarbamate Co(HpDTC)3. All important parameters for the two proposed procedures were optimised (pH, mass of Pb, mass of Co, amount of HpDTC(-), type of surfactant, induction time, etc.). Flotation recovery (R) of Fe was very high (from 94.4 to 104.4%) for the two proposed procedures. The detection limit of the methods was 2.17 μg L(-1) for Pb(HpDTC)2 and 2.39 μg L(-1) for Co(HpDTC)3, respectively. The proposed methods have been applied for the analysis of five samples of drinking water. The acquired AAS results for Fe by both new methods were compared with those obtained by inductively coupled plasma-atomic emission spectrometry (AES-ICP). It is shown that they are in good agreement. The results are also confirmed by the method of standard additions.

Supramolecular solvent-based microextraction method for cobalt traces in food samples with optimization Plackett–Burman and central composite experimental design

“…Due to the interference effect of coexisting ions, [40][41][42][43][44][45][46][47] determinations of metals at trace levels by instrumental methods are very difficult. Because, the interferences compete with other ions for chelating with ligand and give rise to the co-extraction (solvent extraction of two or more compounds, simultaneously) with Co(II).…”

Development of a Simple Fe(II) Ion Colorimetric Sensor from the Immobilization of 1,10-Phenanthroline In Alginate/Pectin Film

“…Several analytical methods have been established for the determination of Fe ions concentration in environmental samples, such as atomic absorption spectrometry (AAS) [4], UV-Visible spectrophotometry [5], inductively coupled plasma-optical emission spectrometry (ICP-OES), and inductively coupled plasma-mass spectrometry (ICP-MS) [6]. However, these methods still have several limitations, such as complicated protocols, time and cost consumption, and requiring a specific technique.…”

“…This comprises of pectin, a polysaccharide composed of D-galacturonic acid monomers forming a long chain through 1,4-glycoside bonds, and commonly found on the plant cell walls [10]. And alginate, a hydrophilic polysaccharide composed of bonds (1,4) between β-D-mannuronate (M) and α-Lguluronate (G) copolymers, and commonly found in seaweed [11]. Both biomaterials are capable of forming strong gels in the presence of divalent cations, such as Ca 2+ ion.…”