A label-free DNAzyme-cleaving fluorescence method for the determination of trace Pb2+based on catalysis of AuPd nanoalloy on the reduction of rhodamine 6G

Luminescence ◽  
2014 ◽  
Vol 30 (3) ◽  
pp. 296-302 ◽  
Author(s):  
Meiling Tang ◽  
Guiqing Wen ◽  
Yanghe Luo ◽  
Caiyan Kang ◽  
Aihui Liang ◽  
...  
Keyword(s):  
Rhodamine 6G ◽  
Fluorescence Method ◽  
Label Free

Label-Free Aptamer Fluorescence Determination of Trace Pb2+ Using AuPd Nanoalloy Probe as Catalyst

2013 ◽  
Vol 631-632 ◽  
pp. 18-21 ◽  
Author(s):  
Zhi Liang Jiang ◽  
Mei Ling Tang ◽  
Qing Ye Liu ◽  
Ai Hui Liang
Keyword(s):  
Detection Limit ◽  
Fluorescence Quenching ◽  
Fluorescence Intensity ◽  
Water Samples ◽  
Catalytic Effect ◽  
Rhodamine 6G ◽  
Label Free ◽  
Double Stranded Dna ◽  
Fluorescence Determination

In the condition of 1.24 mmol/L EDTANa2, 16.7 mmol/L NaCl and 0.17 mmol/L Tris, the substrate chain of double-stranded DNA (dsDNA) could be cracked by Pb2+ to release single-stranded DNA (ssDNA) that adsorb onto AuPd nanoparticle (AuPdNP) and form stable AuPdNP-ssDNA, but the dsDNA can not protect AuPdNP that were aggregated to big AuPdNP aggregations (AuPdNPA) under the action of NaCl. The AuPdNP-ssDNA and AuPdNPA could be separated by centrifugation. With the concentration of Pb2+ increased, the released ssDNA increased, the AuPdNP-ssDNA in centrifugation solution increased and the catalytic effect enhanced on the fluorescence quenching reaction of Rhodamine 6G (Rh6G) and NaH2PO2, which led the fluorescence intensity at 552nm to decrease. The decreased fluorescence intensity (ΔF552nm) was linear to the concentration of Pb2+ in the range of 0.33-8.00 nmol/L, a detection limit of 0.21 nmol/L. The proposed method was applied to detect Pb2+ in water samples, with satisfactory results.

MoS2 quantum-dots as a label-free fluorescent nanoprobe for the highly selective detection of methyl parathion pesticide

2017 ◽  
Vol 9 (4) ◽  
pp. 716-723 ◽  
Author(s):  
Nafiseh Fahimi-Kashani ◽  
Ali Rashti ◽  
M. Reza Hormozi-Nezhad ◽  
Vahideh Mahdavi
Keyword(s):  
Quantum Dots ◽  
Methyl Parathion ◽  
Fluorescence Method ◽  
Selective Detection ◽  
Label Free ◽  
Fluorescent Nanoprobe

A reliable, simple, and sensitive fluorescence method was developed for the determination of methyl parathion (MP) in rice using MoS2 quantum dots (QDs).

A simple and sensitive fluorescence method for the determination of trace ozone in air using acridine red as a probe

Luminescence ◽  
2014 ◽  
Vol 29 (8) ◽  
pp. 1102-1106 ◽  
Author(s):  
Qingye Liu ◽  
Chenyin Lin ◽  
Xinghui Zhang ◽  
Guiqing Wen ◽  
Aihui Liang
Keyword(s):  
Fluorescence Method ◽  
Acridine Red

Determination of memantine in rat plasma by HPLC-fluorescence method and its application to study of the pharmacokinetic interaction between memantine and methazolamide

2011 ◽  
Vol 26 (2) ◽  
pp. 214-219 ◽  
Author(s):  
Mohamed G. Hassan ◽  
Kamla M. Emara ◽  
Horria A. Mohamed ◽  
Hanaa M. Abdel-Wadood ◽  
Rie Ikeda ◽  
...  
Keyword(s):  
Pharmacokinetic Interaction ◽  
Rat Plasma ◽  
Fluorescence Method
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