Graphene quantum dots and the resonance light scattering technique for trace analysis of phenol in different water samples.
A novel, highly selective resonance light scattering (RLS) method was researched and developed for the analysis of phenol in different types of industrial water. An important aspect of the method involved the use of graphene quantum dots (GQDs), which were initially obtained from the pyrolysis of citric acid dissolved in aqueous solutions. The GQDs in the presence of horseradish peroxidase (HRP) and H2O2 were found to react quantitatively with phenol such that the RLS spectral band (310 nm) was quantitatively enhanced as a consequence of the interaction between the GQDs and the quinone formed in the above reaction. It was demonstrated that the novel analytical method had better selectivity and sensitivity for the determination of phenol in water as compared to other analytical methods found in the literature. Thus, trace amounts of phenol were detected over the linear ranges of 6.00×10(-8)-2.16×10(-6)M and 2.40×10(-6)-2.88×10(-5)M with a detection limit of 2.20×10(-8)M. In addition, three different spiked waste water samples and two untreated lake water samples were analysed for phenol. Satisfactory results were obtained with the use of the novel, sensitive and rapid RLS method.
State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; Department of Chemistry, Nanchang University, Nanchang 330031, China.
Ruiling
R
Sun
State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; Department of Chemistry, Nanchang University, Nanchang 330031, China.
Yong
Y
Wang
State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; Department of Chemistry, Nanchang University, Nanchang 330031, China. Electronic address: ynni@ncu.edu.cn.
Yongnian
Y
Ni
School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane 4001, Australia. Electronic address: s.kokot@qut.edu.au.
Serge
S
Kokot
D019343:Citric Acid / Q000737:chemistry; D004784:Environmental Monitoring; D006108:Graphite / Q000737:chemistry*; D006735:Horseradish Peroxidase / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D007220:Industrial Waste; D008027:Light; D057230:Limit of Detection; D018625:Microscopy, Atomic Force; D019800:Phenol / Q000032:analysis / Q000737:chemistry*; D045663:Quantum Dots; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014732:Vibration; D014874:Water Pollutants, Chemical / Q000032:analysis
D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D019343:Citric Acid; D019800:Phenol; D006108:Graphite; D006861:Hydrogen Peroxide; D006735:Horseradish Peroxidase
Graphene quantum dots; Phenol analysis; Resonance light scattering; Waste waters