Nanogold Resonance Rayleigh Scattering Method for NO2- Based on the Phenylenediamine Diazotization

2013 ◽  
Vol 631-632 ◽  
pp. 22-25 ◽  
Author(s):  
Zhi Liang Jiang ◽  
Jin Chao Dong ◽  
Ai Hui Liang
Keyword(s):  
Water Samples ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method ◽  
Azo Compound ◽  
Weak Force ◽  
Strong Resonance ◽  
Strong Forces

There are strong forces between phenylenediamine (PPD) and nanogold particle (AuNP) that make the AuNPs aggregation and exhibit a strong resonance Rayleigh scattering (RRS) peak at 368 nm. When there is NO2-, it reacts with PPD to generate an azo compound. However, there is weak force between AuNP and the azo compound that can’t make the AuNPs aggregation. When concentration of NO2- increased, the AuNP aggregations become weak that led the RRS peak to decrease. The decreased RRS intensity is linear to NO2-concentration in the range of 1-25 μmol/L. This method was applied to analysis of water samples with simplicity.

Catalytic Reaction-Nanogold Resonance Rayleigh Scattering Method for the Determination of Trace Tellurium

2013 ◽  
Vol 787 ◽  
pp. 392-395
Author(s):  
Qing Zeng ◽  
Ai Hui Liang ◽  
Wen Qing Yin ◽  
Zhi Liang Jiang
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Reaction ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method ◽  
Strong Resonance ◽  
Hcl Medium

In 6 mol/L HCl medium, TeO42-is reduced by NaH2PO2to Te that catalyze NaH2PO2reducing HAuCl4to form gold nanoparticles (AuNPs), which exhibited a strong resonance Rayleigh scattering (RRS) peak at 370 nm. With the TeO42-concentration increased, the catalytic reaction enhanced and formed more AuNPs that resulting in the RRS peak increased. Under the chosen conditions, the RRS intensity at 370 nm enhanced linearly with the concentration of TeO42-in the range of 12.5-287.5 nmol/L. This RRS method was sensitivity, selectivity, and simplicity.

Resonance Rayleigh Scattering Method for the Determination of Raloxifene with Evans Blue

2010 ◽  
Vol 20 (12) ◽  
pp. 1552-1556 ◽  
Author(s):  
Li Fan ◽  
Shao-Pu Liu ◽  
Da-Cheng Yang ◽  
Xiao-Li Hu
Keyword(s):  
Evans Blue ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method

Resonance Rayleigh Scattering Spectral Determination of As(V) Using Cu(II) as Catalyst

2013 ◽  
Vol 788 ◽  
pp. 23-26
Author(s):  
Gui Qing Wen ◽  
Ai Hui Liang
Keyword(s):  
Waste Water ◽  
Detection Limit ◽  
Spectral Method ◽  
Correlation Coefficient ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Spectral Determination ◽  
Strong Resonance ◽  
Hcl Medium

In HCl medium and in the presence of CuSO4, Na3AsO4 can be reduced by NaH2PO2 to form As nanoparticles (AsNs) which exhibited a strong resonance Rayleigh scattering (RRS) peak at 370 nm. Under the chosen conditions, the increased intensity at 370 nm was linear to As5+ concentration in the range of 0.48-38.0×10-6 mol/L, with a regression equation of ΔI370nm = 82.3 CAs + 33.9, a correlation coefficient of 0.9878 and a detection limit of 2.0×10-7 mol/L As5+. The proposed method was applied to detect As5+ concentration in waste water, with simplicity, rapidity and accuracy. Thus, a novel RRS spectral method was established to determine As5+.

Resonance Rayleigh Scattering Determination of Trace Hemin Basing on Aptamer-Modified Nanogold Catalysis of HAuCl4-Vitamine C

2013 ◽  
Vol 787 ◽  
pp. 400-403
Author(s):  
Jin Chao Dong ◽  
Ai Hui Liang ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Serum Samples ◽  
Buffer Solution ◽  
Strong Resonance ◽  
Scattering Spectra ◽  
Vitamine C ◽  
Nanogold Catalysis

Hemin aptamer was used to modify gold nanoparticles (AuNPs) to obtain a stable aptamer-nanogold probe (AussDNA). In the condition of pH 8.0 Tris-HCl buffer solution containing 50mmol/L NaCl, the substrate chain of AussDNA was cracked by hemin to produce a short single-stranded DNA(ssDNA) and then further combined with hemin to form a stable hemin-ssDNA conjugate. The AuNPs released from AussDNA would be aggregated in the condition of 50mmol/L NaCl and exhibited a strong resonance Rayleigh scattering (RRS) peak at 368nm. Under the selected conditions, the increased RRS intensity (ΔI368nm) was linear to hemin concentration in the range of 5-750nmol/L, with a detection limit of 66 pmol/L. This RRS method was applied to determination of residual hemin in serum samples, with satisfactory results. The remnant AussDNA in the solution exhibited a strong catalytic activity on the gold particle reaction of HAuCl4-vitamine C (VC) that can be monitored by RRS technique at 368 nm. When the hemin concentration increased, the AussDNA decreased, the catalysis decreased, and the RRS intensity at 368nm decreased. The decreased RRS intensity ΔI368nmwas linear to the hemin concentration in the range of 1-200nmol/L, with a detection limit of 54 pmol/L. Accordingly, a sensitivity, selectivity, and simplicity new method of resonance Rayleigh scattering spectra to detect hemin using aptamer-modified nanogold as catalyst was established.

scholarly journals A Sensitive Resonance Rayleigh Scattering Method for Na+ Based on Graphene Oxide Nanoribbon Catalysis

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Haidong Wang ◽  
Chongning Li ◽  
Yanghe Luo ◽  
Zhiliang Jiang
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Detection Limit ◽  
Gold Nanoparticle ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method ◽  
Graphene Oxide Nanoribbons ◽  
Potassium Pyroantimonate ◽  
Coordination Reaction

The gold nanoparticle reaction of HAuCl4-H2O2 was very slow under 60°C, and the as-prepared graphene oxide nanoribbons (GONRs) exhibited strong catalysis of the reaction to form gold nanoparticles (AuNP) that appeared a resonance Rayleigh scattering (RRS) peak at 550 nm. Upon addition of potassium pyroantimonate (PA) ligand, it was adsorbed on the GONRs surface to inhibit the catalysis to cause the RRS peak decreasing. When the analyte of Na+ was added, the coordination reaction between PA and Na+ took place to form the stable complexes of [Na2(PA)] to release free GONRs catalyst that resulted in the RRS peak increasing linearly. Accordingly, a new and sensitive RRS method for Na+ was established, with a linear range of 0.69-25.8 nmol/L and a detection limit of 0.35 nmol/L Na+.

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