Square wave voltammetry in the determination of Ni2+ and Al3+ in biological sample.
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 x 10(-7) and 1.0 x 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.
Paulino
Alexandre T
AT
Universidade Estadual de Campinas, Departamento de Sistemas Químicos, Faculdade de Engenharia Química, Campinas-São Paulo, Brazil. atpaulino10@gmail.com
Vargas
Alexandro M M
AM
Santos
Lídia B
LB
Nozaki
Jorge
J
Muniz
Edvani C
EC
Tambourgi
Elias B
EB
D000535:Aluminum / Q000032:analysis*; D000818:Animals; D000880:Anthraquinones / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D005399:Fishes; D008839:Microelectrodes; D009532:Nickel / Q000032:analysis*; D010091:Oximes / Q000737:chemistry; D011199:Potentiometry
D000880:Anthraquinones; D010091:Oximes; C013501:dimethylglyoxime; C010078:alizarin; D009532:Nickel; D000535:Aluminum