Microscopic evaluation of aqueous two-phase system emulsion characteristics enables rapid determination of critical polymer concentrations for solution micropatterning

The Analyst ◽  
2017 ◽  
Vol 142 (11) ◽  
pp. 1938-1945 ◽  
Author(s):  
Mackenzie Ruthven ◽  
Kristin Robin Ko ◽  
Rishima Agarwal ◽  
John P. Frampton
Keyword(s):  
Phase Transitions ◽  
Simple Technique ◽  
Rapid Determination ◽  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Microscopic Evaluation ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

A simple technique is presented to identify phase-transitions in polymeric aqueous two-phase systems.

Microfluidic generation of aqueous two-phase system (ATPS) droplets by controlled pulsating inlet pressures

Lab on a Chip ◽  
2015 ◽  
Vol 15 (11) ◽  
pp. 2437-2444 ◽  
Author(s):  
Byeong-Ui Moon ◽  
Steven G. Jones ◽  
Dae Kun Hwang ◽  
Scott S. H. Tsai
Keyword(s):  
Interfacial Tension ◽  
Phase System ◽  
Flow Focusing ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Microfluidic Flow ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Ultralow Interfacial Tension

Simple microfluidic flow focusing generation of droplets from ultralow interfacial tension aqueous two phase systems (ATPS).

Gas Column/Mass Spectrometry Analysis of Bio Oil Treated by Aqueous Two Phase System

2011 ◽  
Vol 236-238 ◽  
pp. 54-58
Author(s):  
Shao Peng Liu ◽  
Zhi Min Zong ◽  
Shan Shan Zhang ◽  
Yue Xu ◽  
Gui Zhen Gong ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectrometry Analysis ◽  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Spectrometry Analysis ◽  
Bio Oil ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Ethanol System

Bio oil aqueous two phase systems were formed with ethanol and the salts of (NH4)2SO4, K2HPO4 and NaH2PO4 in bio oil on the ratio of 10:5:10(by mass). After phase separation, both the upper and the lower layers were analyzed by gas column/mass spectrometry (GC/MS). As a result, both K2HPO4/ethanol and NaH2PO4/ethanol system can enrich phenols and levoglucosan in the upperand lower layers,respectly, while NaH2PO4/ethanol system seldom changes the components of bio oil; the (NH4)2SO4/ethanol system is quit different with the other two and we have detected some components with nitrogen. Hence, NaH2PO4/ethanol is an advantage aqueous two phase system for bio oil treatment.

Passive droplet generation in aqueous two-phase systems with a variable-width microchannel

Soft Matter ◽  
2019 ◽  
Vol 15 (23) ◽  
pp. 4647-4655 ◽  
Author(s):  
Daeho Choi ◽  
Eunjeong Lee ◽  
Sung-Jin Kim ◽  
Minsub Han
Keyword(s):  
Droplet Generation ◽  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Passive droplet generation for an aqueous two-phase system (ATPS) was performed with a fracture-based variable microchannel.

Extraction and stability of selected proteins in ionic liquid based aqueous two phase systems

2014 ◽  
Vol 16 (5) ◽  
pp. 2670-2679 ◽  
Author(s):  
Rupali K. Desai ◽  
Mathieu Streefland ◽  
Rene H. Wijffels ◽  
Michel H. M. Eppink
Keyword(s):  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
The Stability

This article discusses the extraction of Rubisco in an ionic liquid (IL) based aqueous two phase system and the stability of proteins in aqueous solutions of IL.

Influence of process variables on extraction of Cefalexin in a novel biocompatible ionic liquid based-aqueous two phase system

2015 ◽  
Vol 17 (1) ◽  
pp. 655-669 ◽  
Author(s):  
Shiva Abdolrahimi ◽  
Bahram Nasernejad ◽  
Gholamreza Pazuki
Keyword(s):  
Ionic Liquid ◽  
Phase System ◽  
Process Variables ◽  
Organic Salts ◽  
Two Phase ◽  
Salting Out ◽  
Aqueous Two Phase System ◽  
System P ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Despite the fact that ionic liquid-based aqueous two phase systems (ATPSs) have been widely studied for extraction purposes, the adequacy of biodegradable organic salts as salting out agents has been left unexploited.

scholarly journals Liquid-liquid extraction of enzymes by affinity aqueous two-phase systems

2003 ◽  
Vol 46 (4) ◽  
pp. 741-750 ◽  
Author(s):  
Xu Yan ◽  
Maria Aparecida Souza ◽  
Marcela Z. R. Pontes ◽  
Michele Vitolo ◽  
Adalberto Pessoa Júnior
Keyword(s):  
Reactive Dyes ◽  
Liquid Extraction ◽  
Phase System ◽  
Two Phase ◽  
Affinity Ligands ◽  
Aqueous Two Phase System ◽  
Liquid Liquid Extraction ◽  
Commercial Scale ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

From analytical to commercial scale, aqueous two-phase systems have their application in the purification, characterization and study of biomaterials. In order to improve the selectivity of the systems, the biospecific affinity ligands were introduced. In the affinity partitioning aqueous two-phase system, have many enzymes been purified. This review discusses the partitioning of some enzymes in the affinity aqueous two-phase systems in regard to the different ligands, including reactive dyes, metal ions and other ligands. Some integration of aqueous two-phase system with other techniques for more effective purification of enzymes are also presented.

scholarly journals Extraction in cholinium-based magnetic ionic liquid aqueous two-phase system for the determination of berberine hydrochloride in Rhizoma coptidis

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 25201-25209 ◽  
Author(s):  
Li-rong Nie ◽  
Hang Song ◽  
Alula Yohannes ◽  
Siwei Liang ◽  
Shun Yao
Keyword(s):  
Ionic Liquid ◽  
Inorganic Salts ◽  
Phase System ◽  
Two Phase ◽  
Magnetic Ionic Liquids ◽  
Aqueous Two Phase Systems ◽  
Magnetic Ionic Liquid ◽  
Phase Systems ◽  
First Time

Five cholinium type organic magnetic ionic liquids have been applied in ionic liquid-based aqueous two-phase systems by mixing with a series of inorganic salts, which is reported to extract berberine in quantitative analysis for the first time.

Optimization of an Aqueous Two-Phase System for the Determination of Trace Ethyl Carbamate in Red Wine

2019 ◽  
Vol 82 (8) ◽  
pp. 1377-1383 ◽  
Author(s):  
LIJUAN MA ◽  
WENZHE TONG ◽  
LIPING DU ◽  
SHIYONG HUANG ◽  
JINYAN WEI ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Red Wine ◽  
Ethyl Carbamate ◽  
Phase System ◽  
Extraction Temperature ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Relative Standard ◽  
Standard Deviations

ABSTRACT In this study, a novel method using gas chromatography–mass spectrometry coupled with ethanol and K2HPO4 aqueous two-phase system (ATPS) was established for the quantitative determination of trace ethyl carbamate (EC) in red wine. The parameters that influence EC extraction in an aqueous two-phase system, including extraction temperature, time, pH, and ethanol concentration, were optimized. Method validation results indicated that the regression coefficient of the proposed method was 0.9979 in the linear range of 10 to 100 μg/L, and the limits of detection and quantification were 2.8 and 9.2 μg/L, respectively. Four red wine samples made from different grape varieties were processed by the proposed method for the repeatability verification, and EC concentrations were between 15.8 and 37.3 μg/L, with the relative standard deviations ranging from 3.5 to 6.6%. Results of the precision assay showed the average recovery of EC in red wine at 95.4 to 107.1%, with the relative standard deviations ranging from 1.4 to 6.2%. This method proved to be simple and reliable for quantitative determination of trace EC in red wine and would give guidance for quality monitoring of various red wines in the production process.

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