Square Wave Voltammetry in the Determination of Ni2+ and Al3+ in Biological Samples

Abstract

In this contribution, the amounts of Ni (nickel) and Al (aluminum) in tilapias (Oreochromis niloticus) were determined using square wave voltammetry (SWV) with glassy carbon working microelectrode with a mercury thin film, platinum counter electrode, and Ag/AgCl reference electrode. Ni was studied through the formation of the dimethylglyoxime-Ni (Ni-DMG) complex, while Al was studied through the formation of the Alizarin R-Al complex. The detection limit found for Ni-DMG and Alizarin R-Al complexes were 1.70 ¥ 10 -7 and 1.0 ¥ 10 -8 mol L -1 , respectively. The voltammetric anodic curves for the Alizarin R-Al complex were recorded over the potential range from -0.8 to -0.05 V while the voltammetric cathodic curve for the Ni-DMG complex was recorded over the potential range from -0.7 to -1.2 V. These methods detected low concentrations of Ni and Al in biological samples efficiently.

Square‐Wave Voltammetry: A Review on the Recent Progress

“…In the recent years, the SW voltammetry has emerged as a viable and cheap alternative to the expensive and time-consuming techniques (such as chromatography, or spectrophotometry, for example) for the determination of inorganic and biologically important compounds. The simple working set-up, the quick time of performing the measurements, the different modes that can be applied, together with its sensitivity, make the SWV a technique of choice for quantification of important classes of compounds such as proteins [82], vitamins [83], phenols [84][85][86][87][88], benzoquinones [89], pesticides, herbicides and fungicides [90][91][92][93][94][95][96][97][98], alkaloids [99], terpenoids [100], heavy metals [101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116], and drugs [117,118]. One of the most valuable ability of SWV is its application for simultaneous determination of compounds with similar structures present in various pharmaceutical and physiological samples.…”

Efficiency of hydrogels based on natural polysaccharides in the removal of Cd2+ ions from aqueous solutions

“…The following instruments were used: electrochemical cell 663 VA Stand Metrohm, Autolab potentiostate/galvanostate GPES, PGSTA T-30; glassy carbon microelectrode coated with mercury film as working electrode [32], Ag/AgCl electrode as reference and platinum electrode as auxiliary. Analyses were performed using 20.00 mL of supporting electrolyte (0.1 mol L −1 HNO 3 ) and 100 L of Cd 2+ solution in the electrochemical cell.…”

Toxic effects of dietary of Al3+ ions in tilapias (Oreochromis niloticus) and protective effect of Zn2+ ion

“…The only exception in this case was the addition of known amounts of standard Al 3þ solution. Zn 2þ , Ca 2þ , Cu 2þ , and Fe 3þ ions were taken on FAAS (CGAA 7000 ABC Spectrometer with air-acetylene flame and deuterium background correction), whereas Al 3þ was determined by using a method (DPASV) developed by Paulino et al (2008). The digestion of the used feed was accomplished in the following way: feed was dried in an oven at 60 C for 24 h, powdered in a porcelain crucible, and homogenized for 3 g and treated with a nitric/perchloric acid mixture similar to fish samples.…”