title: Rapid and direct electrochemical determination of Ni(II) in industrial discharge water.
abstract: Industrial water contains a number of contaminants, such as organic pollutants and heavy metals, which can significantly affect the quality of soil, ground and environmental waters. We have successfully optimized and tested an electrochemical method and sensor modified with dimethylglyoxime for monitoring of nickel(II). The detection limit was 0.03mg/L and determination limit was 0.09mg/L. Linear concentration range was observed from 0.06 to 0.5mg/L Ni(II) and it is suitable for the analysis of environmental waters. The effect of all parameters important for on-site measurements (such as interferences, presence of dissolved oxygen, temperature) was investigated and considered in the analysis of mine discharge water. Water samples were analyzed without any pretreatment or filtration. A low level of error (5.6%) was observed for analysis demonstrating the usability of the optimized sensor and method for on-site measurements.
authors.affiliation: University of Oulu, Kajaani University Consortium, Measurement Technology Unit CEMIS-Oulu, Kehräämöntie 7, 87400 Kajaani, Finland. Electronic address: Adriana.Ferancova@oulu.fi.
authors.forename: Adriana
authors.initials: A
authors.lastname: Ferancová
authors.affiliation: University of Oulu, Kajaani University Consortium, Measurement Technology Unit CEMIS-Oulu, Kehräämöntie 7, 87400 Kajaani, Finland.
authors.forename: Maarit K
authors.initials: MK
authors.lastname: Hattuniemi
authors.affiliation: University of Oulu, Kajaani University Consortium, Measurement Technology Unit CEMIS-Oulu, Kehräämöntie 7, 87400 Kajaani, Finland.
authors.forename: Adama M
authors.initials: AM
authors.lastname: Sesay
authors.affiliation: University of Oulu, Kajaani University Consortium, Measurement Technology Unit CEMIS-Oulu, Kehräämöntie 7, 87400 Kajaani, Finland.
authors.forename: Jarkko P
authors.initials: JP
authors.lastname: Räty
authors.affiliation: University of Oulu, Kajaani University Consortium, Measurement Technology Unit CEMIS-Oulu, Kehräämöntie 7, 87400 Kajaani, Finland.
authors.forename: Vesa T
authors.initials: VT
authors.lastname: Virtanen
keywords: Electrochemical sensor; Environmental monitoring; Heavy metals; Industrial water; Mine water; Nickel; Voltammetry