Results 31 to 40 of about 20,968 (228)

Preconcentration and Separation of Mixed-Species Samples Near a Nano-Junction in a Convergent Microchannel

open access: yesSensors, 2015
A fluidic microchip incorporating a convergent microchannel and a Nafion-nanoporous membrane is proposed for the preconcentration and separation of multi-species samples on a single platform. In the device, sample preconcentration is achieved by means of
Ping-Hsien Chiu   +2 more
doaj   +1 more source

absolute preconcentration [PDF]

open access: yes, 2014
Citation: 'absolute preconcentration' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.A00027 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Electrohydrodynamic focusing and light propagation in 2-dimensional microfluidic devices for preconcentration of low abundance bioanalytes [PDF]

open access: yes, 2012
This thesis presents work on electrohydrodynamic focusing (EHDF) and photon transmission to aid the development of species preconcentration and identification.
Piasecki, Tomasz
core   +2 more sources

Extraction and Preconcentration of Pd(II) by Dispersive Liquid Liquid Microextraction from different real samples and Determination by Spectrophotometry Uv-Vis [PDF]

open access: yesشیمی کاربردی روز, 2017
This article presents new and sensitive method for the determination of trace amounts of Palladium (II) by dispersive liquid–liquid microextraction(DLLME) combined with UV–vis spectrophotometry. The method is based on the complex formation of Pd(II) with
raziyeh ashtary, shahla elhami
doaj   +1 more source

Nanofluidic preconcentration and detection of nanoparticles [PDF]

open access: yesJournal of Applied Physics, 2012
The fast detection and characterization of nanoparticles, such as viruses or environmental pollutants, are important in fields ranging from biosensing to quality control. However, most existing techniques have practical throughput limitations, which significantly limit their applicability to low analyte concentrations.
Anirban, Mitra   +2 more
openaire   +2 more sources

Cyclodextrin‐Functionalized Light‐Driven Cu2O Micromotors for Simultaneous Capture and Degradation of Bisphenol A

open access: yesAdvanced Robotics Research, EarlyView.
Fuel‐free Cu2O‐based micromotors functionalized with β‐cyclodextrin actively remove bisphenol A from water under visible light. The cyclodextrin shell captures BPA and enhances micromotor motility, leading to faster degradation and higher overall removal than nonfunctionalized Cu2O and Cu2O@Au.
Luisa Natalia Cordoba Urresti   +3 more
wiley   +1 more source

Necessity and Challenges of Sample Preconcentration in Analysis of Multiple MicroRNAs by Capillary Electrophoresis [PDF]

open access: yes, 2020
Here we present the result of our work on achieving sub-pM limit of quantitation in direct quantitative analysis of multiple miRNAs by capillary electophoresis with laser-induced fluorescence detection.
Sergey, Krylov   +4 more
core   +1 more source

The Preconcentration and Determination of Pb2+, Cu2+, Co2+, Ni2+, Fe2+ and Zn2+ Elements in Water Samples Using Citrate Form of Anion-Exchange Resin [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 1995
Lead, copper, cobalt, nickel, iron and zinc ions form monocitrate complexes (negative charge) in citrate solution which is absorbed on the citrate form of anion-exchange resins (citrate as counter ion) y exchange of citrate ion with citrate complexes ...
Mohammad Hossein Arbab Zavar   +1 more
doaj  

Sample Digestion and Combined Preconcentration Methods for the Determination of Ultra-Low Gold Levels in Rocks

open access: yesMolecules, 2019
The gold abundance in basic rocks, which normally varies between 0.5 and 5 ppb, has served as a very important indicator in many geoscience studies, including those focused on the planetary differentiation, redistribution of elements during the crustal ...
Yan-hong Liu, Bo Wan, Ding-shuai Xue
doaj   +1 more source

Determination of cobalt in natural water samples after separation and preconcentration by dispersive liquid-liquid microextraction based on the solidification of floating organic drop [PDF]

open access: yesشیمی کاربردی روز, 2012
A simple, rapid and environmentally friendly method has been developed for the determination of cobalt ions in water samples by dispersive liquid–liquid microextraction based on the solidification of floating organic droplet (DLLME-SFO) coupled with ...
Mohammad Reza Jamali   +2 more
doaj   +1 more source

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