Amino-functionalized silica-encapsulated Mn/ZnS quantum dots for the room-temperature phosphorescence determination of graphene oxide in environmental water samples

2015 ◽  
Vol 7 (18) ◽  
pp. 7874-7878 ◽  
Author(s):  
Yaping Zhong ◽  
Qingpu Wang ◽  
Yu He ◽  
Yili Ge ◽  
Gongwu Song
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Water Samples ◽  
Room Temperature ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Functionalized Silica ◽  
Room Temperature Phosphorescence

We developed a simple and sensitive room-temperature phosphorescence method for the determination of graphene oxide in environmental water samples using amino-functionalized silica-encapsulated Mn/ZnS quantum dots.

scholarly journals Graphene Quantum Dots Sensor for the Determination of Graphene Oxide in Environmental Water Samples

2014 ◽  
Vol 86 (24) ◽  
pp. 12279-12284 ◽  
Author(s):  
Sandra Benítez-Martínez ◽  
Ángela Inmaculada López-Lorente ◽  
Miguel Valcárcel
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Water Samples ◽  
Graphene Quantum Dots ◽  
Environmental Water ◽  
Environmental Water Samples

Phosphorescence detection of 2-mercaptobenzothiazole in environmental water samples by Mn-doped ZnS quantum dots

2017 ◽  
Vol 41 (12) ◽  
pp. 4763-4766 ◽  
Author(s):  
Dan Li ◽  
Zhefeng Fan
Keyword(s):  
Quantum Dots ◽  
Water Samples ◽  
Room Temperature ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Room Temperature Phosphorescence ◽  
Mn Doped

A room-temperature phosphorescence sensor was constructed based on MPA-capped Mn-doped ZnS QDs for the detection of MBT in water samples.

Determination of Organophosphorous Pesticides in Environmental Water Samples Using Surface-Engineered C18 Functionalized Silica-Coated Core-Shell Magnetic Nanoparticles–Based Extraction Coupled with GC-MS/MS Analysis

2017 ◽  
Vol 100 (3) ◽  
pp. 804-809 ◽  
Author(s):  
Neha Srivastava ◽  
Supriya Kumari ◽  
Kishore Nair ◽  
Samsul Alam ◽  
Syed K Raza
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Core Shell ◽  
Aqueous Sample ◽  
Functionalized Silica ◽  
Method Performance ◽  
Ms Analysis

Abstract The present paper depicts a novel method based on magneticSPE (MSPE) for the determination of organophosphorus pesticides (OPs) such as phorate, malathion, and chlorpyrifos in environmental water samples. In this study, C18 functionalized silica-coated core-shell iron oxide magnetic nanoparticles (MNPs) were used as a surface-engineered magnetic sorbent for theselective extraction of pesticides from aqueous samples, followed by GC-MS and GC–tandem MS analysis for confirmative determination of the analytes. Various important method parameters, including quantity of MNP adsorbent, volume of sample, effective time for extraction, nature of the desorbing solvent, and pH of the aqueous sample, were investigated and optimized to obtain maximum method performance. Under the optimized instrumental analysis conditions, good linearity (r2 value ≥0.994) was achieved at the concentration range of 0.5–500 μg/L. Recoveries were in therange of 79.2–96.3 and 80.4–97.5% in selective-ion monitoring and multiple reaction monitoring (MRM) modes, respectively, at the spiking concentrations of 1, 5, and 10 μg/L. MRM mode showed better sensitivity, selectivity, and low-level detection (0.5 μg/L) of analytes. The novel MSPE method is a simple, cheap, rapid, and eco-friendly method for the determination of OPs in environmental water samples.

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