A simple and sensitive flow injection method based on the catalytic activity of CdS quantum dots in an acidic permanganate chemiluminescence system for determination of formaldehyde in water and wastewater

2016 ◽  
Vol 15 (4) ◽  
pp. 496-505 ◽  
Author(s):  
Alireza Khataee ◽  
Roya Lotfi ◽  
Aliyeh Hasanzadeh ◽  
Mortaza Iranifam
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Flow Injection ◽  
Cds Quantum Dots ◽  
Injection Method ◽  
Water And Wastewater ◽  
Cds Qds

The intensity of emitted light from KMnO4–HCHO–CdS QDs system is linearly proportional to HCHO concentration.

Determination of arsenic based on quenching of CdS quantum dots fluorescence using the gas-diffusion flow injection method

Talanta ◽  
2011 ◽  
Vol 85 (2) ◽  
pp. 1063-1069 ◽  
Author(s):  
Nutthaya Butwong ◽  
Tuanjai Noipa ◽  
Rodjana Burakham ◽  
Supalax Srijaranai ◽  
Wittaya Ngeontae
Keyword(s):  
Quantum Dots ◽  
Flow Injection ◽  
Gas Diffusion ◽  
Cds Quantum Dots ◽  
Diffusion Flow ◽  
Injection Method

A novel permanganate–morin–CdS quantum dots flow injection chemiluminescence system for sensitive determination of vancomycin

RSC Advances ◽  
2015 ◽  
Vol 5 (101) ◽  
pp. 82645-82653 ◽  
Author(s):  
Alireza Khataee ◽  
Roya Lotfi ◽  
Aliyeh Hasanzadeh
Keyword(s):  
Quantum Dots ◽  
Flow Injection ◽  
Cds Quantum Dots ◽  
Sensitive Determination ◽  
Cds Qds ◽  
Flow Injection Chemiluminescence

The intensity of emitted light from KMnO4−morin−CdS QDs system is described as a novel chemiluminescence (CL) reaction. The CL intensity of this CL system was remarkably enhanced in the presence of vancomycin.

Highly sensitive determination of copper (II) ions using fluorescence and chemiluminescence emissions of modified CdS quantum dots after it’s preconcentration by dispersive liquid–liquid microextraction

2017 ◽  
Vol 95 (6) ◽  
pp. 704-709 ◽  
Author(s):  
Zohreh Saeedi ◽  
Ali Lotfi ◽  
Javad Hassanzadeh ◽  
Nafiseh Bagheri
Keyword(s):  
Quantum Dots ◽  
High Yield ◽  
Cds Quantum Dots ◽  
Quenching Effect ◽  
Highly Sensitive ◽  
Cds Qds ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction ◽  
Determination Of Copper

Two highly sensitive and selective methods based on fluorescence (FL) and chemiluminescence (CL) emissions of 8-mercaptoquinoline-capped CdS quantum dots (MCQ-CdS QDs) were described for the determination of copper (II) after it’s preconcentration. High fluorescent CdS QDs, synthesized in an aqueous medium, generated a relatively intense CL emission in the presence of potassium permanganate as an oxidant. Furthermore, low quantities of copper (II) ions showed a remarkable quenching effect on both of the CL and FL emissions of MCQ-CdS QDs. Based on this effect, two selective and simple methods were established for Cu2+, and the detection limits of 0.28 and 0.026 ng mL−1 were obtained for the FL and CL methods, respectively. Also, due to the high propensity of MCQ to Cu2+, good selectivity was obtained and no sensible interfering effects from other metal ions were observed. To more sensitize the developed method, an efficient preconcentration process was designed based on the high-yield ultrasound-assisted temperature-controlled ionic liquid dispersive liquid–liquid microextraction (UA-TIL-DLLME) method. Under the optimum conditions, the extracted Cu2+ showed a suppressing effect on the FL and CL emissions of CdS QDs proportional to its initial concentration over the ranges of 0.008–1.4 and 0.001–1.4 ng mL−1, respectively. The limits of detection of 3.7 and 0.37 pg mL−1, respectively, were also achieved. The established methods showed great features and were satisfactorily applied to the monitoring of ultratrace Cu2+ in some different environmental samples.

scholarly journals Sensitive Determination of Cetirizine Using CdS Quantum dots as Oxidase Mimic-mediated Chemiluminescence of Sulfite

2016 ◽  
Vol 5 (7) ◽  
pp. 59-62 ◽  
Author(s):  
Reza Hoseinpour Kouhestany ◽  
Seyed Naser Azizi ◽  
Parmis Shakeri ◽  
Shaghyegh Rahmani
Keyword(s):  
Quantum Dots ◽  
Limit Of Detection ◽  
Ultra Violet ◽  
Cost Effective ◽  
Pharmaceutical Journal ◽  
Water Soluble ◽  
Cds Quantum Dots ◽  
Study Results ◽  
Cds Qds

A new chemiluminescence (CL) method using cadmium sulfide quantum dots (QDs) as sensitizers is proposed for the chemiluminometric determination of cetirizine pharmaceutical formulation. CdS QDs were synthesized by using water soluble route. The nanoparticles were structurally and optically characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Ultra Violet-Visible (UV–Vis) absorption spectroscopy and scanning electron microscopy (SEM). In this study results shows that CdS quantum dots are enhancers of the weak CL emission. Trace amounts of cetirizine improved the sensitize effect of CdS quantum dots yielding a significant chemiluminescence enhancement of the Ce(IV)–SO32?–CdS QDs system. So, a new CL analysis system was selected for the determination of cetirizine. There is a good linear relationship between the relative chemiluminescence intensity and the concentration of cetirizine in the range of 1×10?9– 1×10?6 molL?1 with a correlation coefficient (R2) of 0.9963 at the optimum conditions. The limit of detection (LOD) of this system was found to be 5×10?11 M. This method is simple, sensitive and cost effective, and also is accommodating for pharmaceutical applications.Kouhestany et al., International Current Pharmaceutical Journal, June 2016, 5(7): 59-62

Turn-off–on fluorescence probe based on 3-mercaptopropionic acid-capped CdS quantum dots for selective and sensitive lysozyme detection

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 85795-85801 ◽  
Author(s):  
Xiaotong Liu ◽  
Weidan Na ◽  
Zhengyi Qu ◽  
Xingguang Su
Keyword(s):  
Quantum Dots ◽  
Fluorescence Probe ◽  
Fluorescence Assay ◽  
Cds Quantum Dots ◽  
Mercaptopropionic Acid ◽  
Cds Qds

The fluorescence of CdS QDs was first quenched by hemoglobin and then restored with the increasing concentration of the lysozyme in a certain range. Therefore, a fluorescence assay for the determination of lysozyme was established.

Enhanced electrochemiluminescence of CdS quantum dots capped with mercaptopropionic acid activated by EDC for Zika virus detection

The Analyst ◽  
2021 ◽  
Author(s):  
Hui-Jun Zhang ◽  
Jin Zhu ◽  
Ning Bao ◽  
Shou-Nian Ding
Keyword(s):  
Quantum Dots ◽  
Zika Virus ◽  
Virus Detection ◽  
Cds Quantum Dots ◽  
Mercaptopropionic Acid ◽  
Sandwich Type ◽  
Cds Qds

The mechanism of enhanced ECL of MPA@CdS QDs by EDC activation was investigated, and a sandwich-type ECL immunosensor has been designed for Zika virus detection.

scholarly journals Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+ doped CdS quantum dots

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 7961-7971
Author(s):  
N. D. Vinh ◽  
P. M. Tan ◽  
P. V. Do ◽  
S. Bharti ◽  
V. X. Hoa ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Dopant Concentration ◽  
Core Shell ◽  
Cds Quantum Dots ◽  
Cds Qds

The role of samarium (Sm) dopant on the structural, morphological, and optical properties of CdS QDs and CdS/ZnS core/shell QDs was methodically reported.

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