scholarly journals Study of Silver Nanoparticles Sensitized Fluorescence and Second-Order Scattering of Terbium(III)-Pefloxacin Mesylate Complex and Determination of Pefloxacin Mesylate

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Aiyun Li ◽  
Zhiqiang Song
Keyword(s):  
Silver Nanoparticles ◽  
Excited State ◽  
Relative Intensity ◽  
Second Order ◽  
Keto Acid ◽  
Serum Samples ◽  
Sensitized Fluorescence ◽  
Exciting Wavelength ◽  
Novel Method

α-Keto acid of pefloxacin mesylate (PFLX) can form the complex with Terbium(III). The intramolecular energy from PFLX to Terbium(III) ion takes place when excited, and thus Terbium(III) excited state is formed and then emits the characteristic fluorescence of Terbium(III), locating at 490, 545, 580, and 620 nm. The second-order scattering (SOS) peak at 545 nm also appears for the complex with the exciting wavelength of 273 nm. When the silver nanoparticles are added to the system, the luminescence intensity at 545 nm greatly increased. So, with the adding of nanoparticles to the Terbium(III)-PFLX complex, not only is the intramolecular energy promoted but also the SOS intensity is enhanced. The experimental results show that it is the silver nanoparticles with certain size and certain concentration which can greatly enhance the fluorescence-SOS intensity, and the relative intensity at 545 nm is proportional to the amount of PFLX. Based on this phenomenon, a novel method for the determination of PFLX has been developed and applied to the determination of PFLX in capsule and serum samples.

scholarly journals Determination of Ulifloxacin by Terbium-sensitized Fluorescence with Second-order Scattering and Its Applications

2007 ◽  
Vol 23 (12) ◽  
pp. 1373-1376 ◽  
Author(s):  
Xiaoli WANG ◽  
Bo SHEN ◽  
Huichun ZHAO ◽  
Linpei JIN
Keyword(s):  
Second Order ◽  
Sensitized Fluorescence

Permanganate Based Chemiluminescence Analysis of Cefoperazon

2013 ◽  
Vol 333-335 ◽  
pp. 1807-1810
Author(s):  
De Yi Zhang ◽  
Li Wen Zheng
Keyword(s):  
Excited State ◽  
Standard Deviation ◽  
Potassium Permanganate ◽  
Injection Technique ◽  
Pharmaceutical Samples ◽  
Analysis Process ◽  
Relative Standard ◽  
Novel Method ◽  
Emitting Species

In this paper, a novel method fog determination of chemiluminescence (CL) spectra utilizing LS55 luminescence spectrophotometer was proposed. By this means, the CL spectra generated from the oxidation of cephalosporins with potassium permanganate was investigated. The result indicated that acid potassium permanganate CL system has more then three emitting species, excited state Mn(Ⅱ), Mn(Ⅲ) and singlet oxygen all could be assigned as the possible emitting species of this CL system. Base on above investigation results, sodium cefoperazone in pharmaceutical samples was determined by a CL analysis process combining with flow-injection technique. The detection limits estimated by a conservative model (3σ) of cefoperazone was 0.1µg dm-3, and the maximum relative standard deviation (RSD) was not more than 0.8 % (n=11, ρ=20µg dm-3).

Sequential injection for determination of gamma-aminobutyric acid based on its effect on second order light scattering of silver nanoparticles

2016 ◽  
Vol 51 ◽  
pp. 69-75 ◽  
Author(s):  
Amornrassamee Jinnarak ◽  
Pattarapon Anantavichian ◽  
Apichai Intanin ◽  
Suchada Fungladda ◽  
Nathawut Choengchan ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Light Scattering ◽  
Second Order ◽  
Aminobutyric Acid ◽  
Gamma Aminobutyric Acid ◽  
Sequential Injection

Solvent polarity studies of highly fluorescent laser dye ADS740WS and its fluorescence quenching with silver nanoparticles

2014 ◽  
Vol 92 (2) ◽  
pp. 116-123 ◽  
Author(s):  
V.B. Tangod ◽  
Prasad Raikar ◽  
B.M. Mastiholi ◽  
U.S. Raikar
Keyword(s):  
Silver Nanoparticles ◽  
Excited State ◽  
Fluorescence Quenching ◽  
Dipole Moments ◽  
Linear Regression Analysis ◽  
Solvent Polarity ◽  
Multiple Linear Regression Analysis ◽  
Laser Dye ◽  
Multilinear Analysis

Determination of ground state and excited state dipole moments of a highly fluorescent laser dye molecule ADS740WS and comparison of excited state dipole moment by Lippert, Bakhashiev, Kawski–Chamma–Viallet, McRae, Suppan, and solvent polarity methods. Kamlet–Abboud–Taft and Katritzky multilinear analysis for characterizing the solvent contribution into spectral features of the dye has also been studied. Correlation analysis of spectroscopic data with multiple polarity parameters was carried out by multiple linear regression analysis. Optical absorption and fluorescence of ADS740WS in alcohol and other solvents with attachment of silver nanoparticles (AgNPs) shows quenching of absorption and fluorescence intensities. This is due to size, shape, and coupling between the AgNPs and the dye, and energy transfer between the dye and the AgNPs. Fluorescence quenching of ADS740WS leads to many applications notably for advancement in biomolecular labeling and fluorescence patterning and chemotherapy in cancer treatment.

A novel method for the determination of linting propensity of paper

TAPPI Journal ◽  
2012 ◽  
Vol 11 (10) ◽  
pp. 9-17
Author(s):  
ALESSANDRA GERLI ◽  
LEENDERT C. EIGENBROOD
Keyword(s):  
Ash Content ◽  
The Novel ◽  
Offset Printing ◽  
Excellent Correlation ◽  
End Conditions ◽  
Bottom Side ◽  
Novel Method ◽  
Total Fraction

A novel method was developed for the determination of linting propensity of paper based on printing with an IGT printability tester and image analysis of the printed strips. On average, the total fraction of the surface removed as lint during printing is 0.01%-0.1%. This value is lower than those reported in most laboratory printing tests, and more representative of commercial offset printing applications. Newsprint paper produced on a roll/blade former machine was evaluated for linting propensity using the novel method and also printed on a commercial coldset offset press. Laboratory and commercial printing results matched well, showing that linting was higher for the bottom side of paper than for the top side, and that linting could be reduced on both sides by application of a dry-strength additive. In a second case study, varying wet-end conditions were used on a hybrid former machine to produce four paper reels, with the goal of matching the low linting propensity of the paper produced on a machine with gap former configuration. We found that the retention program, by improving fiber fines retention, substantially reduced the linting propensity of the paper produced on the hybrid former machine. The papers were also printed on a commercial coldset offset press. An excellent correlation was found between the total lint area removed from the bottom side of the paper samples during laboratory printing and lint collected on halftone areas of the first upper printing unit after 45000 copies. Finally, the method was applied to determine the linting propensity of highly filled supercalendered paper produced on a hybrid former machine. In this case, the linting propensity of the bottom side of paper correlated with its ash content.

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