“Turn-On” Fluorescence Determination of β-Glucosidase Activity Using Fluorescent Polymer Nanoparticles Formed from Polyethylenimine Cross-Linked with Hydroquinone

2019 ◽  
Vol 1 (11) ◽  
pp. 3057-3063 ◽  
Author(s):  
Jinshui Liu ◽  
Huijuan Bao ◽  
Chenfu Liu ◽  
Fangfei Wu ◽  
Feng Gao
Keyword(s):  
Polymer Nanoparticles ◽  
Turn On ◽  
Glucosidase Activity ◽  
Fluorescence Determination ◽  
Fluorescent Polymer

Colorimetric and turn-on fluorescence determination of mercury (II) by using carbon dots and gold nanoparticles

2021 ◽  
Author(s):  
Lu Changfang ◽  
Ding Hao ◽  
Wang Yutong ◽  
Xiong Chaoying ◽  
Xianxiang Wang
Keyword(s):  
Gold Nanoparticles ◽  
Carbon Dots ◽  
Turn On ◽  
Fluorescence Determination

“Turn On” Fluorescence Determination of Nitrite Using Green Synthesized Carbon Nanoparticles

2015 ◽  
Vol 26 (1) ◽  
pp. 129-134 ◽  
Author(s):  
Shalini Menon ◽  
Anuja Elevathoor Vikraman ◽  
S. Jesny ◽  
Krishnapillai Girish Kumar
Keyword(s):  
Carbon Nanoparticles ◽  
Turn On ◽  
Fluorescence Determination

X-ray fluorescence determination of zinc sulfate in acidic zinc plating electrolyte

2020 ◽  
Vol 86 (10) ◽  
pp. 18-22
Author(s):  
K. N. Vdovin ◽  
K. G. Pivovarova ◽  
N. A. Feoktistov ◽  
T. B. Ponamareva
Keyword(s):  
Zinc Sulfate ◽  
Zinc Coating ◽  
Electrolyte Composition ◽  
Complexometric Titration ◽  
X Ray ◽  
Fluorescence Determination ◽  
Zinc Plating ◽  
Zinc Determination

Zinc sulfate is the main component in the composition of the acidic zinc plating electrolyte. Deviation in the electrolyte composition from the optimum content leads to destabilization of the electrolysis process and deteriorate the quality of the resulting zinc coating. The proper quality of a zinc coating obtained by galvanic deposition can be ensured only with timely monitoring and adjustment of the electrolyte composition. A technique of X-ray fluorescence determination of zinc (in terms of zinc sulfate) in an acidic zinc plating electrolyte is proposed. The study was carried out using an ARL Quant’X energy dispersive spectrometer (Thermo Fisher Scientific, USA) with a semiconductor silicon-lithium detector. The features of the spectrometer design are presented. The optimal parameters of excitation and detection of zinc radiation were specified when the electrolyte sample was diluted 1:1000. The ZnKα1 line was used as an analytical line. The plotted calibration graph is linear, the correlation coefficient being 0.999234. The results of zinc determination according to the developed method were compared with the data of the reference method of complexometric titration to prove the reliability of the procedure. The results are characterized by good convergence and accuracy. The proposed method of X-ray fluorescence zinc determination in a zinc plating electrolyte equals complexometric titration in the limiting capabilities and even exceeds the latter in terms of the simplicity of sample preparation and rapidity. The developed method of X-ray fluorescence determination of zinc is implemented in analysis of the electrolyte used in the continuous galvanizing unit at «METSERVIS LLC».

X-Ray Fluorescence Determination of Ore Elements in Ferromanganese Formations

2020 ◽  
Vol 56 (14) ◽  
pp. 1423-1430
Author(s):  
V. M. Chubarov ◽  
A. A. Amosova ◽  
A. L. Finkelshtein
Keyword(s):  
X Ray ◽  
Fluorescence Determination

Highly selective and sensitive fluorescence determination of m-Phenylenediamine

2021 ◽  
Vol 167 ◽  
pp. 106283
Author(s):  
Shengli Zhang ◽  
Bofang Liu ◽  
Wei Li ◽  
Tong Lin ◽  
Hongwei Yang ◽  
...  
Keyword(s):  
Fluorescence Determination
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