title: Square wave voltammetry in the determination of Ni2+ and Al3+ in biological sample.
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 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.
authors.affiliation: Universidade Estadual de Campinas, Departamento de Sistemas Químicos, Faculdade de Engenharia Química, Campinas-São Paulo, Brazil. atpaulino10@gmail.com
authors.forename: Alexandre T
authors.initials: AT
authors.lastname: Paulino
authors.forename: Alexandro M M
authors.initials: AM
authors.lastname: Vargas
authors.forename: Lídia B
authors.initials: LB
authors.lastname: Santos
authors.forename: Jorge
authors.initials: J
authors.lastname: Nozaki
authors.forename: Edvani C
authors.initials: EC
authors.lastname: Muniz
authors.forename: Elias B
authors.initials: EB
authors.lastname: Tambourgi
mesh_terms: 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
chemical_list: D000880:Anthraquinones; D010091:Oximes; C013501:dimethylglyoxime; C010078:alizarin; D009532:Nickel; D000535:Aluminum