Fast separation and determination of coumarins in Fructus cnidii extracts by CEC using poly(butyl methacrylate-co -ethylene dimethacrylate-co -[2-(methacryloyloxy)ethyl] trimethylammonium chloride) monolithic columns

2010 ◽  
Vol 33 (8) ◽  
pp. 1099-1108 ◽  
Author(s):  
Jiajing Wang ◽  
Danxia Chen ◽  
Zhao Chen ◽  
Guorong Fan ◽  
Yutian Wu
Keyword(s):  
Butyl Methacrylate ◽  
Monolithic Columns ◽  
Trimethylammonium Chloride ◽  
Fast Separation ◽  
Ethylene Dimethacrylate

scholarly journals Performance Evaluation of Monolith Based Immobilized Acetylcholinesterase Flow-Through Reactor for Copper(II) Determination with Spectrophotometric Detection

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Parawee Rattanakit ◽  
Saisunee Liawruangrath
Keyword(s):  
Sampling Rate ◽  
Calibration Graph ◽  
Butyl Methacrylate ◽  
Spectrophotometric Detection ◽  
Before And After ◽  
Ethylene Dimethacrylate ◽  
Flow Through ◽  
Determination Of Copper

A monolith based immobilized acetylcholinesterase (AChE) flow-through reactor has been developed for the determination of copper(II) using flow injection spectrophotometric system. The bioreactor was prepared inside a microcapillary column byin situpolymerization of butyl methacrylate, ethylene dimethacrylate, and 2,2-dimethoxy-1,2-diphynyletane-1-one in the presence of 1-decanol, followed by vinyl azlactone functionalization and AChE immobilization. The behavior of AChE before and after being immobilized on the monolith was evaluated by kinetic parameters from Lineweaver and Burk equation. The detection was based on measuring inhibition effect on the enzymatic activity of AChE by copper(II) using Ellman’s reaction with spectrophotometric detection at 410 nm. The linear range of the calibration graph was obtained over the range of 0.02–3.00 mg L−1. The detection limit, defined as 10% inhibition (I10), was found to be 0.04 mg L−1. The repeatability was 3.35 % (n=5) for 1.00 mg L−1of copper(II). The proposed method was applied to the determination of copper(II) in natural water samples with sampling rate of 4 h−1.

Rapid determination of sterols in vegetable oils by CEC using methacrylate ester-based monolithic columns

2008 ◽  
Vol 29 (22) ◽  
pp. 4603-4611 ◽  
Author(s):  
María Jesús Lerma-García ◽  
Ernesto F. Simó-Alfonso ◽  
Guillermo Ramis-Ramos ◽  
José M. Herrero-Martínez
Keyword(s):  
Vegetable Oils ◽  
Rapid Determination ◽  
Monolithic Columns

Comprehensive Two-Dimensional Gas Chromatography for the Fast Separation and Determination of Pesticides Extracted from Human Serum

1994 ◽  
Vol 66 (19) ◽  
pp. 3086-3092 ◽  
Author(s):  
Zaiyou. Liu ◽  
Sarath R. Sirimanne ◽  
Donald G. Patterson ◽  
Larry L. Needham ◽  
John B. Phillips
Keyword(s):  
Gas Chromatography ◽  
Human Serum ◽  
Two Dimensional ◽  
Fast Separation

Preconcentration of bisphenols by using calix[4]arene derivatives modified porous polymer monolith coupled with HPLC

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36256-36263 ◽  
Author(s):  
Huiqi Wang ◽  
Shigang Wei ◽  
Huihui Zhang ◽  
Qiong Jia
Keyword(s):  
Porous Polymer ◽  
Butyl Methacrylate ◽  
Polymer Monolith ◽  
Polymer Monolith Microextraction ◽  
Ethylene Dimethacrylate ◽  
Porous Polymer Monolith

A functionalized calix[4]arene (alkenyl@C[4]A) was introduced into the poly(butyl methacrylate-ethylene dimethacrylate) monolith inside a capillary to prepare a polymer monolith microextraction (PMME) material (poly(BMA-alkenyl@C[4]A-EDMA)).

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