Determination of trace uranium by a photo-catalytic resonance fluorescence method coupled with dual cloud point extraction

2016 ◽  
Vol 8 (30) ◽  
pp. 5984-5993 ◽  
Author(s):  
Guirong Li ◽  
Jiekang Li ◽  
Qian Han
Keyword(s):  
Cloud Point ◽  
High Selectivity ◽  
Cloud Point Extraction ◽  
Low Cost ◽  
High Sensitivity ◽  
Fluorescence Method ◽  
Resonance Fluorescence ◽  
Complex Samples ◽  
Resonance Fluorescence Method

(1) Extracting and purifying uranium in complex samples by dCPE with [UO22+–SA1]. (2) Detecting uranium super sensitively by a photocatalytic RF method with [UO22+–SA2]. (3) Coupling with separation, purification and analysis procedures exhibited a number of advantages, including high selectivity, high sensitivity and low cost.

Sensitive and rapid biosensor for the determination of rhamnose based on the catalytic effect of the oxidation of calcein by H2O2

2014 ◽  
Vol 6 (21) ◽  
pp. 8779-8784
Author(s):  
Jia-Ming Liu ◽  
Zhen-bo Liu ◽  
Qitong Huang ◽  
Xiaofeng Lin
Keyword(s):  
Catalytic Reaction ◽  
High Selectivity ◽  
Catalytic Effect ◽  
High Sensitivity ◽  
Fluorescence Method

We report a new catalytic biosensor for the detection of rhamnose (Rha) based on combining the high sensitivity of a fluorescence method with the high selectivity of a catalytic reaction.

Cloud Point Extraction and Spectrophotometry Determination of Lead in Environment Water Using 5-Br-PADAP

2013 ◽  
Vol 830 ◽  
pp. 345-348
Author(s):  
Lin Gao ◽  
Sheng Jie Chen ◽  
Fang Chen ◽  
Wen Hong Zhou ◽  
Jun Long Yao
Keyword(s):  
Cloud Point ◽  
Cloud Point Extraction ◽  
Detection Method ◽  
Low Cost ◽  
Calibration Graph ◽  
Buffer Solution ◽  
Relative Standard ◽  
Triton X ◽  
Optimized Conditions

A simple, sensitive, green and low cost detection method based on the cloud point extraction (CPE) separation and spectrophotometry was proposed for the determination of lead. In pH=9.0 H3BO3 buffer solution, Pb(II) reacts with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) in the presence of Triton X-100 yielding a hydrophobic complex, which then is extracted into micro-volume surfactant-rich phase. The calibration graph was linear in the range of 20-400 µg/L (at 560 nm). Under the optimized conditions, the detection limits of 10.94 µg/L and the relative standard deviations(RSD) of 2.0% (n=5) for Lead(II) were found, respectively. The sensitivity and absorbance of this method are at least five times higher when compared with that of usual 5-Br-PADAP spectrophotometry without CPE, and the proposed method has been applied to the determination of Lead in environment water samples with satisfactory results.

Determination of low levels of Cd(ii) in cosmetic products by spectrophotometry after separation/preconcentration with cloud point extraction

2016 ◽  
Vol 8 (12) ◽  
pp. 2673-2683 ◽  
Author(s):  
Nail Altunay ◽  
Ramazan Gürkan
Keyword(s):  
Cloud Point ◽  
Efficient Method ◽  
Cloud Point Extraction ◽  
Low Cost ◽  
Cosmetic Products ◽  
Spectrophotometric Detection ◽  
Low Levels

In the present study, a simple, low-cost and efficient method was developed for the extraction and preconcentration of Cd(ii) from cosmetic products by using cloud point extraction (CPE) prior to spectrophotometric detection.

The determination of small amounts of sodium by the resonance fluorescence method using a tunable pulsed dye laser

1973 ◽  
Vol 19 (5) ◽  
pp. 1425-1427
Author(s):  
M. A. Bol'shov ◽  
I. D. Guseev ◽  
A. V. Zybin ◽  
V. G. Koloshnikov ◽  
I. A. Maiorov ◽  
...  
Keyword(s):  
Dye Laser ◽  
Fluorescence Method ◽  
Pulsed Dye Laser ◽  
Resonance Fluorescence ◽  
Resonance Fluorescence Method

Metal-organic framework derived metal oxide/reduced graphene oxide nanocomposite, a new tool for the determination of dipyridamole

2021 ◽  
Author(s):  
Naeime Salandari-Jolge ◽  
Ali A. Ensafi ◽  
Behzad Rezaei
Keyword(s):  
Myocardial Infarction ◽  
Graphene Oxide ◽  
High Performance ◽  
High Selectivity ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Heart Patients ◽  
Reduced Graphene ◽  
Metal Organic

Dipyridamole is a prescribed medication used to treat cardiovascular diseases, angina pectoris, imaging tests for heart patients, and myocardial infarction. Therefore, high selectivity and sensitivity, low cost, and high-performance speed...

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