Resonance Rayleigh Scattering Spectral Method for Trace Fe3+ Using 1, 4-Dithiothreitol-Modified Nanogold as Probe

2012 ◽  
Vol 260-261 ◽  
pp. 701-706
Author(s):  
Gui Qing Wen ◽  
Liang Qin Wu ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Spectral Method ◽  
Correlation Coefficient ◽  
Water Samples ◽  
Rayleigh Scattering ◽  
Regression Equation ◽  
Resonance Rayleigh Scattering

1, 4-dithiothreitol (DTT) combined with nanogold (AuNP) to form the DTT-AuNP probe in the solution of 1.0 mmol/L H2SO4. In the presence of Fe3+, the DTT-AuNPs aggregated to big particles that exhibited a maximum Resonance Rayleigh scattering (RRS) peak at 770 nm. Under the chosen conditions, the increased intensity was linear to Fe3+ concentration in the range of 7.3-149.5µg/L, with the regression equation of ΔI770nm = 127.5C +11.2, the correlation coefficient of 0.9954 and the detection limit of 3.75 ug/L Fe3+. The proposed method was applied to detect trace Fe3+ in water samples, with satisfactory results.

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+.

A Dithiothreitol-Modified Nanogold Resonance Rayleigh Scattering Spectral Probe for Detection of Trace Cr(VI)

2013 ◽  
Vol 668 ◽  
pp. 370-374
Author(s):  
Jin Qiao Long ◽  
Li Li Xu ◽  
Bin Chen ◽  
Ai Hui Liang ◽  
Zhi Liang Jiang
Keyword(s):  
Waste Water ◽  
Detection Limit ◽  
Water Samples ◽  
Rayleigh Scattering ◽  
Sodium Citrate ◽  
Regression Equation ◽  
Resonance Rayleigh Scattering

Cr(VI); dithiothreitol; Nanogold; Resonance Rayleigh scattering spectral assay. Abstract. Nanogold (NG) in size of 15 nm was prepared by sodium citrate procedure, and it was modified by 1,4-dithiothreitol (DTT) to form NG-DTT probe for Cr(VI). In diluted H2SO4 medium, the probe interacted with Cr(VI) to form big NG clusters that led to the resonance Rayleigh scattering (RS) peak at 720 nm increased greatly. Under the selected conditions, the increased RS intensity (ΔI720nm) is linear to Cr(VI) concentration in the range of 10-50 nmol/L, with a regression equation of ΔI720nm= 2.05 C-7.5, coefficient of 0.9989, and a detection limit of 5 nmol/L. This nanogold RS method was applied to determination of Cr(VI) in waste water samples, with satisfactory results.

A New and Sensitive Hydride Generation-Nanosilver Resonance Rayleigh Scattering Spectral Method for Trace Se (IV)

2013 ◽  
Vol 734-737 ◽  
pp. 2456-2459
Author(s):  
Shan Shan Huang ◽  
Ai Hui Liang ◽  
Mei Ling Tang ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Spectral Method ◽  
Water Samples ◽  
Rayleigh Scattering ◽  
Hydride Generation ◽  
Resonance Rayleigh Scattering ◽  
Hcl Solution

In HCl solution, the Se (IV) was reduced to SeH2 by NaBH4, and absorbed by solution of ethanol-AgNO3. The Ag+ was reduced to nanosilver, which led to the resonance Rayleigh scattering (RRS) peak at 366 nm increased. Under the selected conditions, the RRS intensity at 366 nm was linear to the concentration of Se (IV) in the range of 0.05-2.0 μg/mL, a detection limit of 0.02 μg/mL. The proposed method was applied to detect Se (IV) in water samples, with satisfactory results.

Nanogold Resonance Rayleigh Scattering Method for Trace NO2- Based on P-Aminobenzene Sulfonic Acid-Α-Naphthylamine Colored Reaction

2013 ◽  
Vol 716 ◽  
pp. 62-65
Author(s):  
Gui Qing Wen ◽  
Ting Sheng Li ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Correlation Coefficient ◽  
Azo Dye ◽  
Sulfonic Acid ◽  
Rayleigh Scattering ◽  
Regression Equation ◽  
Acidic Condition ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method ◽  
Color System

In acidic condition, NO2- combined with p-aminobenzene sulfonic acid by diazotization, and then reacted with α-naphthylamine to form purple azo dye. The resonance Rayleigh scattering (RRS) signal of the color system was detected by nanogold probe. Under the chosen conditions, the decreased RRS intensity ΔI (ΔI= Ib - I) at 500 nm was linear to the NO2- concentration in the range of 7.0×10-2-42.0μmol/L, with a regression equation of ΔI=6.72 C - 6.93, a correlation coefficient of 0.9982 and a detection limit of 2.6×10-4 mol/L NO2-.

Resonance Rayleigh Scattering Spectral Determination of Vitamin C by Nanogold Catalysis

2012 ◽  
Vol 260-261 ◽  
pp. 815-819
Author(s):  
Gui Qing Wen ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Vitamin C ◽  
Spectral Method ◽  
Correlation Coefficient ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Spectral Determination ◽  
Beverage Samples ◽  
Nanogold Catalysis

The nanogold catalysis effect on the reaction between HAuCl4 and Vitamin C (VC) was studied by resonance Rayleigh scattering (RS) spectroscopy at 540 nm, and a simple, rapid RS spectral method was established to determine VC. Under the chosen conditions, the increased intensity at 540 nm was linear to the VC concentration in the range of 7×10-6-2.8×10-4mol/L, with a regression equation of ΔI540 = 2.98 CVC + 13.4, a correlation coefficient of 0.9909 and a detection limit of 2×10-6 mol/L VC. The proposed method was applied to detect VC content in VC tablets and beverage samples, with simplicity, rapidity and accuracy.

A Resonance Rayleigh Scattering Method for the Determination of Trace Benzotriazole Based on Complex Particle

2013 ◽  
Vol 830 ◽  
pp. 448-451
Author(s):  
Ling Ling Ye ◽  
Ai Hui Liang
Keyword(s):  
Detection Limit ◽  
Nitrogen Atom ◽  
Rayleigh Scattering ◽  
Hydroxylamine Hydrochloride ◽  
Regression Equation ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method ◽  
Buffer Solution ◽  
Complex Particle

In pH 4.2 HAc-NaAc buffer solution, hydroxylamine hydrochloride reduced Cu2+ to Cu+ that coordinate the nitrogen atom of 1,2,3-benzotriazole (BTA) to form Cu-BTA complex particles with a resonance Rayleigh scattering (RRS) peak at 369 nm. Under the selected conditions, when the BTA concentration increased, the RRS intensity at 369 nm increased. The increased RRS intensity ΔI369nm was linear to BTA concentration in the range of 0.17-13.36 µg/mL, with a regression equation of ΔI369nm = 89.91C + 96.7, and the detection limit is 0.17 µg/mL. Accordingly, a new RRS method for BTA was established.

Resonance Rayleigh Scattering Spectra Property of Selenium Nanoparticles and its Analytical Application

2013 ◽  
Vol 664 ◽  
pp. 736-740
Author(s):  
Ai Hui Liang ◽  
Shan Shan Huang ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Rayleigh Scattering ◽  
Regression Equation ◽  
Selenium Nanoparticles ◽  
Analytical Application ◽  
Resonance Rayleigh Scattering ◽  
Strong Resonance ◽  
Peak Intensity ◽  
Scattering Spectra ◽  
Hcl Medium

In 0.1 mol/L HCl medium and the presence of 0.3% glycerin as stabilizer, selenium (Ⅳ) was reduced by thiourea to form selenium nanoparticles, which exhibited a strong resonance Rayleigh scattering (RRS) peak at 366 nm. The RRS peak intensity increased when selenium (Ⅳ) increased. The increased RRS intensity at 366 nm (ΔI366nm) was proportional to the selenium (Ⅳ) concentration (C) from 1 to 32 μg/L, with a regression equation of ΔI366nm = 222.99 C+74.69, and detection limit of 1.19 ng/L. This proposed method was applied to detect selenium in samples, with satisfactory results.

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

2013 ◽  
Vol 788 ◽  
pp. 383-386
Author(s):  
Ling Ling Ye ◽  
Ai Hui Liang
Keyword(s):  
Detection Limit ◽  
Nitrogen Atom ◽  
Catalytic Reaction ◽  
Rayleigh Scattering ◽  
Hydroxylamine Hydrochloride ◽  
Regression Equation ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method ◽  
Buffer Solution

In pH 4.2 HAc-NaAc buffer solution, hydroxylamine hydrochloride reduced Cu2+to Cu+that coordinate the nitrogen atom of 1,2,3-benzotriazole (BTA) to form Cu-BTA complex particles with a resonance Rayleigh scattering (RRS) peak at 369 nm. Under the selected conditions, when the BTA concentration increased, the RRS intensity at 369 nm increased. The increased RRS intensity ΔI369nmwas linear to BTA concentration in the range of 0.17-13.36 μg/mL, with a regression equation of ΔI369nm= 89.91C + 96.7, and the detection limit is 0.17 μg/mL. Accordingly, a new RRS method for BTA was established.

scholarly journals A Simple and Selective Nanocatalytic Resonance Rayleigh Scattering Spectral Method for the Determination of Trace Re

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Shengmian Wang ◽  
Guiqing Wen ◽  
Tingsheng Li ◽  
Xianjiu Liao ◽  
Aihui Liang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Spectral Method ◽  
Rayleigh Scattering ◽  
Catalytic Effect ◽  
Resonance Rayleigh Scattering ◽  
Strong Resonance ◽  
Hcl Medium

In the HCl medium, rhenium (VII) or Re nanoparticles exhibited strong catalytic effect on the slow Te particle reaction between Te(VI) and Sn(II) at 70°C. The product of formed Te particles shows two strong resonance Rayleigh scattering peaks at 778 nm and 540 nm. The RS intensity at 778 nm enhanced linearly with Re concentration. The enhanced RS intensity was linear Re concentration in the range of 0.01–2.0 nmol·L−1, with a detection limit of 0.005 nmol·L−1Re. This method was applied to the analysis of Re in ore sample, and the results were in agreement with that of the spectrophotometry.

An Aptamer-Nanogold Probe for Trace PDGF Using Resonance Rayleigh Scattering as Detection Technique

2013 ◽  
Vol 668 ◽  
pp. 365-369
Author(s):  
Jin Qiao Long ◽  
Lin Wei ◽  
Ai Hui Liang ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Growth Factor ◽  
Rayleigh Scattering ◽  
Regression Equation ◽  
Detection Technique ◽  
Platelet Derived Growth Factor ◽  
Resonance Rayleigh Scattering ◽  
Buffer Solution

The aptamer of platelet-derived growth factor (PDGF) was used to modified nanogold to obtain a stable aptamer-nanogold(Apt-NG) probe for PDGF. In the condition of pH 7.2 Na2HPO4-NaH2PO4 buffer solution and 5.33 mmol/L NaCl, the Apt-NG specifically combined with PDGF to form Apt-NG-PDGFA cluster that resulted in the resonance Rayleigh scattering (RRS) intensity at 550 nm. When the PDGF concentration increased, the nanogold aggregated (NGA) increased, and the RRS intensity at 550 nm increased. The increased RRS intensity ΔI550nm was linear to the PDGF concentration in the range of 3.33-40 ng/mL, with a regression equation of ΔI550nm=10.8 C-24.2, coefficient of 0.9932 and a detection limit of 0.53 ng/mL

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