Determination of tannic acid based on luminol chemiluminescence catalyzed by cupric oxide nanoparticles

2015 ◽  
Vol 7 (5) ◽  
pp. 1924-1928 ◽  
Author(s):  
Guang-Wen Li ◽  
Lei Hong ◽  
Meng-Sha Tong ◽  
Hao-Hua Deng ◽  
Xing-Hua Xia ◽  
...  
Keyword(s):  
Tannic Acid ◽  
Flow Injection ◽  
Cupric Oxide ◽  
Cuo Nanoparticles ◽  
Oxide Nanoparticles ◽  
Injection Method ◽  
Luminol Chemiluminescence ◽  
Cupric Oxide Nanoparticles ◽  
Acid Determination

Tannic acid was identified to inhibit the CL signal of CuO nanoparticles-catalyzed luminol–H2O2 system, and a flow injection method was developed for tannic acid determination.

scholarly journals Determination of the bioaccessible fraction of cupric oxide nanoparticles in soils using an in vitro human digestibility simulation

2019 ◽  
Vol 6 (2) ◽  
pp. 432-443
Author(s):  
J. Vassallo ◽  
K. Tatsi ◽  
R. Boden ◽  
R. D. Handy
Keyword(s):  
Intestinal Absorption ◽  
Cupric Oxide ◽  
Oxide Nanoparticles ◽  
Human Intestinal Absorption ◽  
Bioaccessible Fraction ◽  
Cupric Oxide Nanoparticles

This study looks at the potential for ingested nanomaterials dosed in soil, to become bioaccessible for human intestinal absorption.

Alkaline peroxidase activity of cupric oxide nanoparticles and its modulation by ammonia

The Analyst ◽  
2017 ◽  
Vol 142 (20) ◽  
pp. 3986-3992 ◽  
Author(s):  
Hao-Hua Deng ◽  
Xiao-Qing Zheng ◽  
Yan-Yu Wu ◽  
Xiao-Qiong Shi ◽  
Xiu-Ling Lin ◽  
...  
Keyword(s):  
Peroxidase Activity ◽  
Fluorescent Sensor ◽  
Cupric Oxide ◽  
Cuo Nanoparticles ◽  
Oxide Nanoparticles ◽  
Cupric Oxide Nanoparticles

Based on the ammonia-modulated alkaline peroxidase-like activity of CuO nanoparticles, a fluorescent sensor for urea and urease was developed.

scholarly journals A Low Cost Synthesis and Characterization of CuO Nanoparticles for Photovoltaic Applications

2019 ◽  
Vol 60 (1) ◽  
pp. 17-23
Author(s):  
A. A. Yankson ◽  
A. Kuditcher ◽  
G. Gebreyesus ◽  
M. N. Y. H. Egblewogbe ◽  
J. K. A. Amuzu ◽  
...  
Keyword(s):  
Particle Size ◽  
Size Distribution ◽  
Cupric Oxide ◽  
Low Cost ◽  
Cuo Nanoparticles ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photovoltaic Applications ◽  
Cupric Oxide Nanoparticles

A simple low cost chemical route has been used to synthesize cupric oxide nanoparticles. The synthesized CuO nanoparticles were characterized using XRD, TEM and UV-absorption. X-ray diffraction analysis showed the synthesized nanoparticles to be a pure cupric oxide. EDAX analysis showed the presence of copper and Oxygen in the as prepared CuO nano particles, with the AAS indicating that Cu2+ represented 53.5% of the sample. The particle size and particle size distribution of the cupric oxide nanoparticles were obtained by transmission electron microscopy (TEM) whereas the crystallite size and crystallite size distribution were obtained by X-ray diffraction. The particle size was found to be between 20 nm and 60 nm. The particle size distribution obtained from cumulative percentage frequency plots features a log-normal function. Absorbance measurements and analysis showed that the material has an absorbance peak at 314 nm and energy bandgap of 1.48 eV, making it a good candidate for photovoltaic applications.

scholarly journals Sequential determination of chromium(VI) and chromium(III) by potentiometric flow-injection method.

2000 ◽  
Vol 49 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Hiroki OHURA ◽  
Toshihiko IMATO ◽  
Ikuo MATSUO ◽  
Sumio YAMASAKI
Keyword(s):  
Flow Injection ◽  
Injection Method ◽  
Sequential Determination ◽  
Chromium Vi

scholarly journals Spectrophotometric flow injection procedure to indirect determination of paracetamol in pharmaceutical formulations using o-tolidine as reagent

2018 ◽  
Vol 33 (2) ◽  
pp. 47
Author(s):  
Orlando Fatibello-Filho ◽  
Heberth Juliano Vieira
Keyword(s):  
Standard Deviation ◽  
Detection Limit ◽  
Flow Injection ◽  
Pharmaceutical Formulations ◽  
Injection Method ◽  
Indirect Determination ◽  
Analytical Curve ◽  
Relative Standard ◽  
Injection Procedure

A spectrophotometric flow injection method for the determination of paracetamol in pharmaceutical formulations is proposed. The procedure was based on the oxidation of paracetamol by sodium hypochloride and the determination of the excess of this oxidant using o-tolidine dichloride as chromogenic reagent at 430 nm. The analytical curve was linear in the paracetamol concentration range from 8.50 x 10-6 to 2.51 x 10-4 mol L-1 with a detection limit of 5.0 x 10-6 mol L-1. The relative standard deviation was smaller than 1.2% for 1.20 x 10-4 mol L-1 paracetamol solution (n = 10). The results obtained for paracetamol in pharmaceutical formulations using the proposed flow injection method and those obtained using a USP Pharmacopoeia method are in agreement at the 95% confidence level.

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