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97 Newest Publications about the topic sample concentration

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Self-generation of two-dimensional droplet array using oil–water immiscibility and replacement

25-May-2018 | Hiroki Yasuga; Koki Kamiya; Shoji Takeuchi; Norihisa Miki, Lab on a Chip, 2018

Two-dimensional (2D) microdroplet arrays with indexed sample concentration gradients have been receiving considerable attention for high-throughput biological and medical analyses. However, the preparation of such an array by conventional methods mandates precise pipetting and/or pumping. In this ...

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Sensors, Vol. 18, Pages 1084: An In-Vitro Optical Sensor Designed to Estimate Glycated Hemoglobin Levels

04-Apr-2018 | Mandal, Sanghamitra ; Manasreh, M. O., Sensors, 2018

Sensors, Vol. 18, Pages 1084: An In-Vitro Optical Sensor Designed to Estimate Glycated Hemoglobin Levels Sensors doi: 10.3390/s18041084 Authors: Sanghamitra Mandal M. O. Manasreh The purpose of this research was to design an optical sensor for evaluating glycated hemoglobin ...

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Sensors, Vol. 18, Pages 1084: An In-Vitro Optical Sensor Designed to Estimate Glycated Hemoglobin Levels

04-Apr-2018 | Mandal, Sanghamitra ; Manasreh, M. O., Sensors, 2018

Sensors, Vol. 18, Pages 1084: An In-Vitro Optical Sensor Designed to Estimate Glycated Hemoglobin Levels Sensors doi: 10.3390/s18041084 Authors: Sanghamitra Mandal M. O. Manasreh The purpose of this research was to design an optical sensor for evaluating glycated hemoglobin ...

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Electroosmotic Effects on Sample Concentration at the Interface of a Micro/Nanochannel

07-Aug-2017 | Honggu Chun, Analytical Chemistry, 2017

Electroosmotic effect on electropreconcentration of analytes was investigated at the micro/nanochannel interface for a series of 1-D glass nanochannels with depths of 72, 54, 29, and 9 nm. The electric double layer approaches overlap conditions as the nanochannel depth decreases, suppressing the ...

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Fast analysis of quaternary ammonium pesticides in food and beverages using cation‐exchange chromatography coupled with isotope‐dilution high‐resolution mass spectrometry

05-Aug-2017 | Tiziana Nardin, Chiara Barnaba, Franco Abballe, Gianmaria Trenti, Mario Malacarne, Roberto Larcher, Journal of Separation Science, 2017

A fast separation based on cation‐exchange liquid chromatography coupled with high‐resolution mass spectrometry is proposed for simultaneous determination of chlormequat, difenzoquat, diquat, mepiquat and paraquat in several food and beverage commodities. Solid samples were extracted using a mix ...

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Tuning Metabolome Coverage in Reversed Phase LC–MS Metabolomics of MeOH Extracted Samples Using the Reconstitution Solvent Composition

28-Jun-2017 | Anna Lindahl; Siv Sääf; Janne Lehtiö; Anders Nordström, Analytical Chemistry, 2017

Considering the physicochemical diversity of the metabolome, untargeted metabolomics will inevitably discriminate against certain compound classes. Efforts are nevertheless made to maximize the metabolome coverage. Contrary to the main steps of a typical liquid chromatography–mass spectrometry ...

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Speciation Analysis of Arsenite, Arsenate and Dimethylarsenic Acid Using Silica-based Columns and ICP-OES

18-May-2017 | Phattamajintatamrong, Nawapong; Puanngam, Mahitti; Imyim, Apichat, Current Analytical Chemistry, 2017

Abstract: Background: Arsenic is widely known as a toxic element and can cause adverse health effects. The determination of total arsenic does not indicate the level of their actual hazard. Therefore, the speciation analysis of arsenic is more significant than the determination of total ...

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Determination of selected metals in rice and cereal by inductively coupled plasma-optical emission spectrometry (ICP-OES)

14-May-2017 | Author(s): Erik J. Sneddon, Carey J. Hardaway, Joseph Sneddon, Kiran Boggavarapu, Andrew S. Tate, Stephani ..., Microchemical Journal, 2017

Publication date: September 2017 Source:Microchemical Journal, Volume 134 Author(s): Erik J. Sneddon, Carey J. Hardaway, Joseph Sneddon, Kiran Boggavarapu, Andrew S. Tate, Stephanie L. Tidwell, Daniel P. Gary, Chris Douvris A study to determine the concentration of metals in ...

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Screening for Polar Chemicals in Water by Trifunctional Mixed-Mode Liquid Chromatography–High Resolution Mass Spectrometry

12-May-2017 | Rosa Montes; Josu Aguirre; Xandro Vidal; Rosario Rodil; Rafael Cela; José Benito Quintana, Environmental Science & Technology, 2017

The presence of persistent and mobile organic contaminants (PMOC) in aquatic environments is a matter of high concern due to their capability of crossing through natural and anthropogenic barriers, even reaching drinking water. Most analytical methods rely on reversed-phase liquid chromatography ...

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Diffusion Layer Formation Drives Zone Migration in Traveling Wave Electrophoresis

05-Apr-2017 | William Albert Booth; Kyoo Dong Jo; Aaron Timperman; Jarrod Schiffbauer; Boyd E Edwards, Analyst, 2017

COMSOL finite element modeling software is used to simulate 2D traveling-wave electrophoresis for microfluidic separations and sample concentration. A four-phase AC potential is applied to a periodic interdigitated four-electrode array to produce a longitudinal electric wave that travels through ...

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