+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Sensing of Cu²⁺ Based on Fenton Reaction and Unmodified Gold Nanoparticles

, : Sensing of Cu²⁺ Based on Fenton Reaction and Unmodified Gold Nanoparticles. Guang Pu Xue Yu Guang Pu Fen Xi 35(11): 3151-3154

Heavy metal pollution has received great attentions in recent years. The traditional methods for heavy metal detection rely on the expensive laboratory instruments and need time-consuming preparation steps; therefore, it is urgent to develop quick and highly sensitive new technologies for heavy metal detection. The colorimetric method based on the gold nanoparticles (AuNPs) features with simple operation, high sensitivity and low cost, therefore, enabling it widely concerned and used in the environmental monitoring, food safety and chemical and biological sensing fields. This work developed a simple, rapid and highly sensitive strategy based on the Fenton reaction and unmodified AuNPs for the detection of Cu²⁺ in water samples. The hydroxyl radical ( · OH) generated by the Fenton reaction between the Cu²⁺ and sodium ascorbate (SA) oxidized the single stranded DNA (ssDNA) attached on the AuNPs surface into variable sequence fragments. The cleavage of ssDNA induced the aggregation of AuNPs in a certain salt solution, therefore, resulting in the changes on the absorbance of solution. The assay conditions were optimized to be pH value of 7.9, 11 mg · L⁻¹ ssDNA, 8 mmol · L⁻¹ SA and 70 mmol · L⁻¹ NaCl. Results showed that the absorbance ratio values at the wavelengths of 700 and 525 nm (A₇₀₀/A₅₂₅) were linearly correlated with the Cu²⁺ concentrations. The linear detection range was 0.1-10.0 µmol · L⁻¹ with a detection limit of 24 nmol · L⁻¹ (3σ). Spiked recoveries ranged from 87%-120% in three sorts of water, including drinking water, tap water and lake water, which confirmed that the potentials of the proposed assay for Cu²⁺ detection in reality.


PMID: 26978926

Other references

Pande, D.C., 1956: Natural regeneration of spruce and fir in Uttar Pradesh. Preliminary field work in laying out a set of experiments to investigate the natural and artificial regeneration of the two species was done in Chakrata division during May and June 1956. At the same time a study was conducted to find the effect o...

Vidal, S.; Horvath, E.; Cameselle Teijeiro, J.; Cohen, S.M.; Kovacs, K.; Bartke, A., 2003: Effect of protracted estrogen administration on the activity of follicular cells of the thyroid in mice. Estrogens (E) affect non-neoplastic thyroid activity as well as initiation and progression of thyroid tumors. Using GH, PRL and TSH deficient Ames dwarf mice we have previously demonstrated that in the absence of TSH E exerts a negative feedback o...

Goldstein, E.J.; Citron, D.M.; Corrado, M.L., 1987: Effect of inoculum size on in vitro activity of norfloxacin against fecal anaerobic bacteria. Rationale for selective decontamination of the digestive tract. Previous studies have shown that anaerobic bacteria are susceptible to norfloxacin at the levels attained in the feces. Conversely, studies in laboratory animals and neutropenic humans using norfloxacin for selective decontamination of the digesti...

Hu, S.; Mo, X.; Lin, Z.; Qiu, J., 2011: Emergy assessment of a wheat-maize rotation system with different water assignments in the north China plain. Sustainable water use is seriously compromised in the North China Plain (NCP) due to the huge water requirements of agriculture, the largest use of water resources. An integrated approach which combines the ecosystem model with emergy analysis is...

Aerts J.C.J.H.; van Deursen W.P.A.; Kriek M.; Schepel M., 1998: STREAM (Spatial Tools for River basins and Environment and Analysis of Management options); the Ganges, Brahmaputra, Meghna river basin. Annales Geophysicae (1988) 16, Suppl

Mohammadi, H.; McCulloch, C.A., 2014: Impact of elastic and inelastic substrate behaviors on mechanosensation. In this review we summarize current data on the mechanics of synthetic and naturally occurring biopolymers that are routinely employed in examination of contractility and cellular mechanosensation. We discuss the effect of physical boundaries on t...

Donohoe, T.J.; Mitchell, L.; Waring, M.J.; Helliwell, M.; Bell, A.; Newcombe, N.J., 2003: Scope of the directed dihydroxylation: application to cyclic homoallylic alcohols and trihaloacetamides. The synthesis and directed dihydroxylation of a range of cyclic alkenes was investigated. Both homoallylic alcohols and homoallylic trihaloacetamides were found to be efficient directing groups, giving rise to good to excellent levels of remote as...

Casey, J.L.; Bergmann, K.F.; Brown, T.L.; Gerin, J.L., 1993: Determinants of RNA editing in hepatitis delta virus. Progress in Clinical and Biological Research 382: 5-11

Shields, L.; Cox, C.; Grandia, L.; Bennett, S.; Critchfield, G.; Clark, E., 1993: Using quality management techniques to select an LIS. Healthcare Informatics 10(9): 46-8, 50, 52-4

Sagoo, M.S.; Lagnado, L., 1997: Ca-2+ increases the apparent affinity of transducin for GTP. Investigative Ophthalmology & Visual Science 38(4 PART 1-2): S614