scholarly journals SORPTION OF ERYTHROSINE ONTO SILICA GEL MODIFIED BY CETYLPYRIDINIUM BROMIDE

2021 ◽  
Vol 26 (3(79)) ◽  
pp. 77-85
Author(s):  
O. M. Guzenko ◽  
O. M. Zhukovetska ◽  
D. M. Mukienko ◽  
V. V. Shopovalenko ◽  
A. N. Chebotarev ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Silica Gel ◽  
Solid Phase ◽  
Ion Pairs ◽  
Sodium Dodecylsulfate ◽  
Test System ◽  
Competitive Sorption ◽  
Cetylpyridinium Bromide ◽  
Modified Silica Gel ◽  
Water Desorption

In the current paper, adsorbent based on silica gel L 40/100 modified with cetylpyridinium bromide was obtained. The presence of cetylpyridinium cations on the silica gel surface was confirmed by the diffuse reflectance infrared fourier transform spectroscopy method. The sorption conditions of erythrosine from dilute aqueous solutions with the proposed sorbent were studied and optimized. It is shown that the use of modified silica gel allows efficient (>95%) extraction of erythrosine from aqueous solutions. Under optimal sorption conditions (pH 7, sorbent dosage 0.1 g and sorption time is 15 min), the sorption capacity of modified erythrosine sorbents was determined. It is shown that, with increasing temperature, a change in the isotherm type from the H‑type to the L‑type is observed. This change can be explained by the aggregation of erythrosin in solution, which is a competitive sorption process. It was shown that adsorption isotherms were well described by the Langmuir equation. Thermodynamic studies have made it possible to establish the spontaneous sorption. The desorption of erythrosine from the surface of silica gel modified with cetylpyridinium bromide was studied. It is shown that when using solutions of sulfuric acid, sodium hydroxide and distilled water, desorption does not occur. It was shown that the most effective eluent is solution of sodium dodecylsulfate in alkaline medium, and desorption of erythrosine occurs due to the destruction of ion pairs of dye anions with cetylpyridinium cations fixed on the surface. The data obtained can then be used to develop a test system for determination of erythrosine via corresponding colorimetric scales or for quantitative solid phase extraction and adsorption-spectroscopic quantification of erythrosine in some real samples.

scholarly journals The Solid Phase Extraction of Some Metal Ions Using Palladium Nanoparticles Attached to Silica Gel Chemically Bonded by Silica-Bonded N-Propylmorpholine as New Sorbent prior to Their Determination by Flame Atomic Absorption Spectroscopy

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
M. Ghaedi ◽  
M. Rezakhani ◽  
S. Khodadoust ◽  
K. Niknam ◽  
M. Soylak
Keyword(s):  
Electron Microscopy ◽  
Metal Ions ◽  
Silica Gel ◽  
Solid Phase ◽  
Food Samples ◽  
Natural Food ◽  
Modified Silica Gel ◽  
Flame Atomic Absorption ◽  
Relative Standard

In this research at first palladium nanoparticle attached to a new chemically bonded silica gel has been synthesized and has been characterized with different techniques such as X-ray diffraction (XRD), fourier transform infrared (FT-IR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). Then, this new sorbent (chemically modified silica gel with N-propylmorpholine (PNP-SBNPM)) was efficiently used for preconcentration of some metal ions in various food samples. The influence of effective variables including mass of sorbent, flow rate, pH of sample solutions and condition of eluent such as volume, type and concentration on the recoveries of understudy metal ions were investigated. Following the optimization of variables, the interfering effects of some foreign ions on the preconcentration and determination of the investigated metal ions described. At optimum values of variables, all investigated metal ions were efficiently recovered with efficiency more than 95%, relative standard deviation (RSD) between 2.4 and 2.8, and detection limit in the range of 1.4–2.7 ng mL−1. The present method is simple and rapidly applicable for the determination of the understudied metal ions (ng mL−1) in different natural food samples.

Functionalization of silica gel with 5-hydroxymethylfurfural: preparation, characterization and preliminary verification

2017 ◽  
Vol 41 (12) ◽  
pp. 4738-4742 ◽  
Author(s):  
Cheng Wang ◽  
Limin Huang ◽  
Yuanyuan Lin ◽  
Youjia Li ◽  
Yajing Hou ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Silica Gel ◽  
Solid Phase ◽  
Hybrid Composites ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Inorganic Hybrid

Herein, we report the organic–inorganic hybrid composites comprising surficial-modified silica gel with 5-HMF as a solid phase for liquid chromatography.

scholarly journals Recovery of gangliosides from aqueous solutions on styrene-divinylbenzene copolymer columns

2002 ◽  
Vol 43 (8) ◽  
pp. 1335-1340 ◽  
Author(s):  
Iuliana Popa ◽  
Cristina Vlad ◽  
Jacques Bodennec ◽  
Jacques Portoukalian
Keyword(s):  
Aqueous Solutions ◽  
Silica Gel ◽  
Salt Concentration ◽  
High Stability ◽  
Solid Phase ◽  
General Procedure ◽  
Optimal Conditions ◽  
Alkaline Conditions ◽  
Styrene Divinylbenzene ◽  
Multiple Cycles

An investigation was made using a styrene-divinylbenzene copolymer as a solid phase sorbent to recover gangliosides from aqueous solutions. A comparison with octadecyl-bonded (C18) silica gel showed that the general procedure used to purify gangliosides on C18 silica gel could be used with the copolymer. The yield of gangliosides depended on various parameters such as the composition of the conditioning solution, the salt concentration of the loading solution, and the amount of applied gangliosides per gram of copolymer. In optimal conditions, the recovery of gangliosides and other lipids present in the upper phases of partition was higher than 95%. Using radiolabeled gangliosides, it was found that gangliosides present in serum-containing medium could also be quantitatively recovered on copolymer, provided the medium was diluted with an equal volume of methanol prior to its application onto the column.The major advantage of the copolymer is its high stability in acidic or alkaline conditions that allows multiple cycles of cleaning and reconditioning of the sorbent without alteration of its chromatographic properties.

Effective phospholipid removal from plasma samples by solid phase extraction with the use of copper (II) modified silica gel cartridges

2017 ◽  
Vol 1070 ◽  
pp. 1-6 ◽  
Author(s):  
Jolanta Flieger ◽  
Małgorzata Tatarczak-Michalewska ◽  
Anna Kowalska ◽  
Anna Madejska ◽  
Tomasz Śniegocki ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Silica Gel ◽  
Solid Phase ◽  
Phase Extraction ◽  
Plasma Samples ◽  
Modified Silica ◽  
Modified Silica Gel

Preparation of Imprinted Polymer with D-Phenylalanin on Silica Surface

2009 ◽  
Vol 419-420 ◽  
pp. 541-544
Author(s):  
Hong Xing Dong ◽  
Qiu Li Jiang ◽  
Fei Tong ◽  
Zhen Xing Wang ◽  
Jin Yong Tang
Keyword(s):  
Silica Gel ◽  
High Performance ◽  
Silica Surface ◽  
Solid Phase ◽  
Adsorption Property ◽  
Research Field ◽  
Imprinted Polymer ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Functional Monomers

Silica gel was modified with polymerizable double bonds on the surface. Then the molecular imprinting polymer imprinted with D-Phenylalanin was grafted on the surface of modified silica gel. The molecularly imprinted polymer (MIP) based on the surface of silica gel was characterized by IR and scanning electron microscopy (SEM). The adsorption property of D-Phenylalanin by MIP was mearsured. The MIP with the combined functional monomers exhibited better adsorption properties and selectivity compared with the corresponding non-imprinted polymers or MIP with the single functional monomer. The material could be used in separation research field, such as packing material of high performance liquid chromatography, solid-phase extraction and so on.

A novel environment-friendly hybrid material based on a modified silica gel with a bispyrazole derivative for the removal of ZnII, PbII, CdIIand CuIItraces from aqueous solutions

2017 ◽  
Vol 4 (11) ◽  
pp. 1821-1831 ◽  
Author(s):  
Smaail Radi ◽  
Mohamed El Massaoudi ◽  
Maryse Bacquet ◽  
Stéphanie Degoutin ◽  
N. N. Adarsh ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Aqueous Solutions ◽  
Silica Gel ◽  
Hybrid Material ◽  
Efficient Removal ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Environment Friendly ◽  
Novel Environment ◽  
Removal Of Heavy Metals

New surface-functionalized with bispyrazole receptor was designed for efficient removal of heavy metals. The architecture of host–guest on the surface was identified.

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