Differential Pulse Polarographic Determination of Zinc and Manganese in Commercial Sodium Salts and Water Samples after Preconcentration of Their 2-(2-Pyridylazo)-5-diethylaminophenol Chelates Using Ammonium Tetraphenylborate-Naphthalene Adsorbent

Abstract

A highly sensitive, rapid and economical differential pulse polarographic method was developed for the simultaneous determination of trace amounts of zinc and manganese in commercial sodium salts, mineral water, human hair and environmental waste liquid and solid samples. Ammonium tetraphenylborate-microcrystalline naphthalene coprecipitate, loaded in a plastic syringe-type cartridge (i.d. 10 mm, length 100 mm), was used as a column for the preconcentration of zinc and manganese as their 2-(2-pyridylazo)-5-diethylaminophenolates. The retention was quantitative in the pH range 7.5 -11.0 and 9.0 -11.5 for Zn and Mn, respectively. Preconcentration factors of 50 and 75 were obtained at a flow rate of 10 ml/min for zinc and manganese, respectively. The detection limits were 300 ng for Zn and 500 ng for Mn in 10 ml of the final solution at signal-to-noise ratio of 3. Various parameters were studied and the developed analytical methodology was validated by analyzing NIES certified reference materials such as human hair, chlorella and tea leaves.

Simultaneous Determination of Cadmium, Lead, Copper and Mercury Ions Using Organofunctionalized SBA‐15 Nanostructured Silica Modified Graphite–Polyurethane Composite Electrode

“…Electrochemical methods possess multielement detection and speciation capability and need instrumentation of relatively low acquisition, maintenance and operation costs. Using differential pulse or square wave anodic stripping voltammetry techniques, limits of detection lower than the regulatory levels of concentrations of heavy metals can usually be reached [19,20].…”

Simultaneous determination of lead, copper and cadmium onto mercury film supported on wax impregnated carbon paste electrode

“…The electrochemical methods possess multi-element detection capability and require instrumentation of low cost and low maintenance. Using differential pulse anodic stripping voltammetry (DPASV) technique using static mercury drop electrode (SMDE) very low detection limit for many metal ions with wide linear range [18][19] can also be obtained.…”

Quinoline-8-ol-immobilized Amberlite XAD-4: Synthesis, characterization, and uranyl ion uptake properties suitable for analytical applications

“…Furthermore, it reduces consumption of and exposure to solvent and disposal costs. A number of different solid sorbents such as naphthalene [3,4,5], cellulose [6], C 18 -bonded silica membrane discs [7], silica gel [8,9], glass beads [10,11,12], silica frit [13], metal hydroxides [14], activated carbon [15,16] and polymer supports [17,18] have been investigated for the preconcentration of trace metals.…”