Growth of two‐layer copolymer as the stationary phase with very high separation efficiency for separating peptides in capillary electrochromatography

2021 ◽  
Author(s):  
Genlin Sun ◽  
Weiyang Tang ◽  
Yao Lu ◽  
Kyung Ho Row
Keyword(s):  
Stationary Phase ◽  
Capillary Electrochromatography ◽  
Separation Efficiency ◽  
Very High ◽  
High Separation

Gas Liquid Vane Separators in High Pressure Applications

2010 ◽  
Author(s):  
Dani Fadda ◽  
David Barker
Keyword(s):  
Separation Efficiency ◽  
Pressure Vessels ◽  
Cfd Modeling ◽  
Test Results ◽  
Capacity Curves ◽  
Liquid Handling ◽  
Wide Range ◽  
Computational Fluid Dynamics Cfd ◽  
Very High ◽  
High Separation

Vane separators are inertial devices used to remove entrained liquids from gas. They are utilized in pressure vessels operating at a wide range of temperatures and pressures. Computational Fluid Dynamics (CFD) modeling and sizing calculations are used to evaluate the loading to a vane separator and determine the maximum overall gas and liquid handling capacity of the pressure vessel. Test results, performed at operating pressures up to 133 bar (1931 psia) using live natural gas illustrate that, when sized correctly based on the vane’s capacity curves and CFD modeling, vane separators continue to have high separation efficiency at very high operating pressures.

scholarly journals Silica Monolithic Capillary Columns for Hilic Separations

2018 ◽  
Vol 46 (1) ◽  
pp. 39-42
Author(s):  
Dana Moravcová ◽  
Josef Planeta
Keyword(s):  
Stationary Phase ◽  
Separation Efficiency ◽  
Stationary Phases ◽  
Ammonium Hydroxide ◽  
Capillary Columns ◽  
Optimal Separation ◽  
Monolithic Capillary Columns ◽  
High Separation ◽  
Theoretical Plates ◽  
Separation Conditions

Abstract The monolithic capillary columns (0.1 mm x 150 mm) prepared by the acidic hydrolysis of tetramethoxysilane (TMOS) in the presence of polyethylene glycol (PEG) and urea were modified by zwitterionic stationary phases and evaluated under HILIC separation conditions by employing a mixture containing nucleosides and nucleotides. The polymeric layer of zwitterions did not affect the high separation efficiency of the original silica monolith. The prepared zwitterionic columns exhibited high separation efficiencies in a range 61,000-289,000 theoretical plates/m for a 2- methacryloyloxyethyl phosphorylcholine-based stationary phase and in a range 59,000-135,000 theoretical plates/m for a [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide-based stationary phase under optimal separation conditions. The grafted layer of zwitterions on the silica monolithic surface also significantly improved the separation selectivity to compounds of interest

An innovative approach for separation and purification of natural products using carbon nanotube–alginate gel beads as a novel stationary phase

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 10878-10885 ◽  
Author(s):  
Jingjing Long ◽  
Yuan Wang ◽  
Yanan Xu ◽  
Xu Li
Keyword(s):  
Natural Products ◽  
Liquid Chromatography ◽  
Carbon Nanotube ◽  
Stationary Phase ◽  
Separation Efficiency ◽  
Packing Material ◽  
Separation And Purification ◽  
Preparative Liquid Chromatography ◽  
Gel Beads ◽  
High Separation

A new packing material is studied in preparative or semi-preparative liquid chromatography with high separation efficiency and quality.

Chromatographic Techniques for Rare Earth Elements Analysis

2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Beibei Chen ◽  
Man He ◽  
Huashan Zhang ◽  
Zucheng Jiang ◽  
Bin Hu
Keyword(s):  
Rare Earth ◽  
Separation Efficiency ◽  
Stationary Phases ◽  
Exchange Chromatography ◽  
Chromatographic Techniques ◽  
Mobile Phases ◽  
Very High ◽  
High Separation ◽  
Separation Of Rees

AbstractThe present capability of rare earth element (REE) analysis has been achieved by the development of two instrumental techniques. The efficiency of spectroscopic methods was extraordinarily improved for the detection and determination of REE traces in various materials. On the other hand, the determination of REEs very often depends on the preconcentration and separation of REEs, and chromatographic techniques are very powerful tools for the separation of REEs. By coupling with sensitive detectors, many ambitious analytical tasks can be fulfilled.Liquid chromatography is the most widely used technique. Different combinations of stationary phases and mobile phases could be used in ion exchange chromatography, ion chromatography, ion-pair reverse-phase chromatography and some other techniques. The application of gas chromatography is limited because only volatile compounds of REEs can be separated. Thin-layer and paper chromatography are techniques that cannot be directly coupled with suitable detectors, which limit their applications. For special demands, separations can be performed by capillary electrophoresis, which has very high separation efficiency.

Separation of Emulsified Oil from Industrial Wastewater Using Poly Silicate Ferro-Aluminum Sulphate (PSFAS): A Novel Methodology for the Attainment of Very High Separation Efficiency

2021 ◽  
Author(s):  
Anup Kumar Bairagi ◽  
Kollati Prudhvi Ravikumar ◽  
Abanti Sahoo ◽  
Soumya Sanjeeb Mohapatra ◽  
Sangam Agrawal
Keyword(s):  
Industrial Wastewater ◽  
Metal Content ◽  
Separation Efficiency ◽  
Contaminated Water ◽  
Emulsified Oil ◽  
Aluminum Sulphate ◽  
Very High ◽  
High Separation ◽  
Maximum Separation

Abstract The large amount of wastewater generated from textile industries, petroleum industries, chemical industries contains heavy metals, suspended solids, hazardous waste, oils, fatty acids, dyes, pigment etc. It is very important to improve the quality of contaminated water before it discharges into the water sources or use. In the current work, an efficient methodology has been developed to separate emulsified oil from wastewater. The emulsified oil is tried to separate by using poly silicate Ferro aluminium sulphates, a flocculent. In addition to the above, the maximum separation efficiency for the devolved process is also revealed. Using PSFA, up to 93.5 % separation efficiency is achieved, and the discussed methodology can separate emulsified forms of the oil without altering the efficiency. The dissolved solid and metal content are also considered as the controlling parameters for the separation efficiency. The optimum TDS and the metal content must be maintained at 560 mg/L and 2 mg/L, respectively, to attain maximum separation efficiency.

scholarly journals An underestimated technique. Does pressurized and pressure-assisted capillary electrochromatography have potential in drug and pharmacological-active compounds analysis?

2019 ◽  
Vol 32 (2) ◽  
pp. 92-98
Author(s):  
Michal Zmuda Trzebiatowski ◽  
Radoslaw L. Gwarda ◽  
Tadeusz H. Dzido
Keyword(s):  
Capillary Electrochromatography ◽  
Pharmaceutical Analysis ◽  
Separation Efficiency ◽  
Analytical Techniques ◽  
Review Article ◽  
Biomedical Analysis ◽  
Total Cost ◽  
The World ◽  
Pressurized Capillary Electrochromatography ◽  
High Separation

Abstract Pharmaceutical analysis guarantees patient safety all over the world. Thus, continuous development of existing analytical techniques is still very important. Pressurized capillary electrochromatography and pressure-assisted capillary electrochromatography are hybrid separation techniques that combine the selectivity of liquid chromatography and the high separation efficiency of capillary electrophoresis. They use a smaller amount of reagents and samples, hence, reducing the total cost of analysis. Therefore they have found application in a number of pharmaceutical and biomedical analysis. This review article focuses on the use and importance of pressurized and pressure-assisted capillary electrochromatography in pharmaceutical and biomedical analysis, taking into account types of detectors and capillaries used. Despite the fact that pressurized capillary electrochromatography and pressure assisted capillary electrochromatography offer many possibilities and have been available for over a dozen years, they are still underdevelopment and not fully explored.

A polyvinyl alcohol-coated silica gel stationary phase for hydrophilic interaction chromatography

The Analyst ◽  
2015 ◽  
Vol 140 (18) ◽  
pp. 6250-6253 ◽  
Author(s):  
Shunli Ji ◽  
Yang Zheng ◽  
Feifang Zhang ◽  
Xinmiao Liang ◽  
Bingcheng Yang
Keyword(s):  
Polyvinyl Alcohol ◽  
Stationary Phase ◽  
Silica Gel ◽  
Chemical Stability ◽  
Separation Efficiency ◽  
Hydrophilic Interaction Chromatography ◽  
Hydrophilic Interaction ◽  
High Chemical ◽  
High Separation ◽  
High Chemical Stability

A facile and green way is proposed to prepare a polyvinyl alcohol coated silica gel stationary phase for HILIC. It demonstrated high separation efficiency and high chemical stability.

Sign in / Sign up

Export Citation Format

Share Document