title: Greener analytical method for the determination of copper(II) in wastewater by micro flow system with optical sensor.
abstract: Greener analytical method using micro flow system for the determination of Cu(II) in wastewater samples was designed and investigated. The micro flow system consisted of a planar glass chip with poly(dimethylsiloxane) (PDMS) top plate and fixed with fiber optic probe as optical sensor for monitoring of Cu(II) that reacted with 2-carboxy-2'-hydroxy-5'-sulfoformazyl benzene (zincon) on the chip at 605nm. This design gave a satisfied sensitivity with a linear calibration graph over the range of 0.1-3.0mugmL(-1) of Cu(II) and correlation coefficient 0.9991. The percentage relative standard deviation was 2.5 for 10-replicate measurements and the limit of detection (LOD) was 0.1mugmL(-1). This system has been successfully applied to the determination of Cu(II) in wastewaters from electroplating industry with less reagents and samples consumption and diminutive waste generation.
authors.affiliation: Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Division of Analytical Chemistry, Department of Chemical Technology, Rajamangala University of Technology Krungthep, Bangkok 10120, Thailand.
authors.forename: Tapparath
authors.initials: T
authors.lastname: Leelasattarathkul
authors.forename: Saisunee
authors.initials: S
authors.lastname: Liawruangrath
authors.forename: Mongkon
authors.initials: M
authors.lastname: Rayanakorn
authors.forename: Boonsom
authors.initials: B
authors.lastname: Liawruangrath
authors.forename: Winai
authors.initials: W
authors.lastname: Oungpipat
authors.forename: Napaporn
authors.initials: N
authors.lastname: Youngvises