title: Real-time Assay of Toxic Lead in In Vivo Living Plant Tissue.
abstract: A method of detecting lead was developed using square wave anodic stripping voltammetry (SWASV) with DNA-carbon nanotube paste electrode (CNTPE). The results indicated a sensitive oxidation peak current of lead on the DNA-CNTPE. The curves were obtained within a concentration range of 50 ngL(-1)-20 mgL(-1) with preconcentration time of 100, 200, and 400 sec at the concentration of mgL(-1), μgL(-1), and ngL(-1), respectively. The observed relative standard deviation was 0.101% (n = 12) in the lead concentration of 30.0 μgL(-1) under optimum conditions. The low detection limit (S/N) was pegged at 8 ngL(-1) (2.6 × 10(-8) M). Results showed that the developed method can be used in real-time assay in vivo without requiring any pretreatment and pharmaceutical samples, and food samples, as well as other materials requiring water source contamination analyses.
authors.affiliation: Biosensor Research Institute in Seoul National University of Science and Technology, Seoul, Korea.
authors.forename: Suwyoung
authors.initials: S
authors.lastname: Ly
authors.affiliation: Dept. of Fine Chemistry, Seoul National Univ. of Science and Technology, Seoul, Korea.
authors.forename: Nack Joo
authors.initials: NJ
authors.lastname: Kim
authors.affiliation: Advanced Scientific Research Group in Shinil High School, Seoul, Korea.
authors.forename: Minsang
authors.initials: M
authors.lastname: Youn
authors.affiliation: Advanced Scientific Research Group in Shinil High School, Seoul, Korea.
authors.forename: Yongwook
authors.initials: Y
authors.lastname: Kim
authors.affiliation: Advanced Scientific Research Group in Shinil High School, Seoul, Korea.
authors.forename: Yeolmin
authors.initials: Y
authors.lastname: Sung
authors.affiliation: Advanced Scientific Research Group in Shinil High School, Seoul, Korea.
authors.forename: Dohoon
authors.initials: D
authors.lastname: Kim
authors.affiliation: Advanced Scientific Research Group in Shinil High School, Seoul, Korea.
authors.forename: Tackhyun
authors.initials: T
authors.lastname: Chung
keywords: DNA-CNTPE; In vivo; Lead anodic stripping voltammetry; Low concentration; Plant; Tap water