Ampholine-functionalized hybrid organic–inorganic silica material as sorbent for solid-phase extraction of acidic and basic compounds

Wang, Tingting; Chen, Yihui; Ma, Junfeng; Chen, Mingliang; Nie, Chenggang; Hu, Minjie; Li, Ying; Jia, Zhijian; Fang, Jianghua; Gao, Haoqi

doi:10.1016/j.chroma.2013.08.025

Cited by 37 publications

(21 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The proposed system can combine inorganic stability and durability with plasticity and specific properties normally associated with organic materials. Functionalization of the inorganic structure is an approach, which allows for obtaining hybrid materials with improved behavior and application [3] [4]. Functional hybrids can successfully be applied in any field, which requires contact interactions on the surface (environmental remediation, immobilization of biomolecules, etc.)…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of Functionalized Porous Silica Hybrid Materials

Todorova¹,

Chernev²,

Djambazov³

2014

OJINM

View full text Add to dashboard Cite

Functionalized silica hybrid materials are extensively studied and applied materials in the field of science and technology. Functionalization is an approach, which allows for the application of organic components in the improvement of the design, properties and potential application of silicate materials. Silica hybrid materials, functionalized via incorporation of organic components (chitosan and methacrylic acid) were synthesized by the sol-gel method. The base silica structure of the hybrids was obtained via hydrolysis and condensation of the silicate precursor, tetraethyl orthosilicate. The investigations of synthesized hybrids are focused on the influence of the nature and quantity of functional organic components on their final structures and properties. The structural characteristics of obtained hybrid materials were investigated using XRD, FTIR, SEM and DTA/TG analysis. The obtained results presented the formation of amorphous porous structure and the organic components are evenly distributed into the silica network. The functional radicals of chitosan and methacrylic acid (amine, hydroxyl groups) exist in the hybrid structure as free reactive centers, as their quantity increases with increasing the organic amount. The swelling behavior in acidic and neutral solutions of the synthesized materials is investigated and the results presented, that the silicate materials exhibit hydrophilic character.

show abstract

Section: Introductionmentioning

confidence: 99%

Structure and Properties of Functionalized Porous Silica Hybrid Materials

Todorova¹,

Chernev²,

Djambazov³

2014

OJINM

View full text Add to dashboard Cite

show abstract

“…As shown in Fig. D, the recoveries of the selected analytes increased with the increase of salt concentration from 0.0 to 0.2 M, and then decreased with salt concentration higher than 0.2 M. It can be explained by that when at lower ionic strength (salt concentration lower than 0.2 M), the phenomenon resulted from the counterions added with a high affinity for the ion‐exchange phase, so that the analytes were displaced from sorbent . However, a further increase of eluent ionic strength might decrease the solubility of analytes in the eluent and enhance their partitioning into the adsorbent due to the salting‐out effect , which meant π–π and hydrophobic interactions would play a predominant role in the extraction of the selected analytes at higher ionic strength.…”

Section: Resultsmentioning

confidence: 95%

“…The pH value of the sample solution not only strongly influences the state of analytes in solution as ionic or neutral molecules, but also affects the surface charge of the Nbim‐MCWNTs/SiO 2 sorbent . Therefore, the effect of sample solution pH (3.0–8.0) on the extraction performances was investigated.…”

Section: Resultsmentioning

confidence: 99%

Solid-phase extraction using bis(indolyl)methane-modified silica reinforced with multiwalled carbon nanotubes for the simultaneous determination of flavonoids and aromatic organic acid preservatives

et al. 2015

View full text Add to dashboard Cite

A novel bis(indolyl)methane-modified silica reinforced with multiwalled carbon nanotubes sorbent for solid-phase extraction was designed and synthesized by chemical immobilization of nitro-substituted 3,3'-bis(indolyl)methane on silica modified with multiwalled carbon nanotubes. Coupled with high-performance liquid chromatography analysis, the extraction properties of the sorbent were evaluated for flavonoids and aromatic organic acid compounds. Under optimum conditions, the sorbent can simultaneously extract five flavonoids and two aromatic organic acid preservatives in aqueous solutions in a single-step solid-phase extraction procedure. Wide linear ranges were obtained with correlation coefficients (R(2) ) ranging from 0.9843 to 0.9976, and the limits of detection were in the range of 0.5-5 μg/L for the compounds tested. Compared with the silica modified with multiwalled carbon nanotubes sorbent and the nitro-substituted 3,3'-bis(indolyl)methane-modified silica sorbent, the developed sorbent exhibited higher extraction efficiency toward the selected analytes. The synergistic effect of nitro-substituted 3,3'-bis(indolyl)methane and multiwalled carbon nanotubes not only improved the surface-to-volume ratio but also enhanced multiple intermolecular interactions, such as hydrogen bonds, π-π, and hydrophobic interactions, between the new sorbent and the selected analytes. The as-established solid-phase extraction with high-performance liquid chromatography and diode array detection method was successfully applied to the simultaneous determination of flavonoids and aromatic organic acid preservatives in grape juices with recoveries ranging from 83.9 to 112% for all the selected analytes.

show abstract

“…A novel adsorbent, ampholine‐functionalized hybrid organic–inorganic silica was synthesized by immobilizing ampholine onto hybrid organic–inorganic silica to extract both basic and acidic food additives and pollutants in soft drinks . SEM image of the adsorbent indicates the granular morphology and shows that ampholine was successfully immobilized on the hybrid organic–inorganic silica matrix evenly (Fig.…”

Section: Application Of Organic–inorganic Hybrid Based Adsorbents In Spementioning

confidence: 99%

“…SEM images of ampholine‐functionalized hybrid organic–inorganic silica sorbent (top) and its partially enlarged view (bottom). Reproduced from with permission…”

Section: Application Of Organic–inorganic Hybrid Based Adsorbents In Spementioning

confidence: 99%

Advances in organic–inorganic hybrid sorbents for the extraction of organic and inorganic pollutants in different types of food and environmental samples

Kamaruddin

Ibrahim

et al. 2017

J of Separation Science

View full text Add to dashboard Cite

The efficiency of the extraction and removal of pollutants from food and the environment has been an important issue in analytical science. By incorporating inorganic species into an organic matrix, a new material known as an organic-inorganic hybrid material is formed. As it possesses high selectivity, permeability, and mechanical and chemical stabilities, organic-inorganic hybrid materials constitute an emerging research field and have become popular to serve as sorbents in various separaton science methods. Here, we review recent significant advances in analytical solid-phase extraction employing organic-inorganic composite/nanocomposite sorbents for the extraction of organic and inorganic pollutants from various types of food and environmental matrices. The physicochemical characteristics, extraction properties, and analytical performances of sorbents are discussed; including morphology and surface characteristics, types of functional groups, interaction mechanism, selectivity and sensitivity, accuracy, and regeneration abilities. Organic-inorganic hybrid sorbents combined with extraction techniques are highly promising for sample preparation of various food and environmental matrixes with analytes at trace levels.

show abstract

Ampholine-functionalized hybrid organic–inorganic silica material as sorbent for solid-phase extraction of acidic and basic compounds

Cited by 37 publications

References 32 publications

Structure and Properties of Functionalized Porous Silica Hybrid Materials

Structure and Properties of Functionalized Porous Silica Hybrid Materials

Solid-phase extraction using bis(indolyl)methane-modified silica reinforced with multiwalled carbon nanotubes for the simultaneous determination of flavonoids and aromatic organic acid preservatives

Advances in organic–inorganic hybrid sorbents for the extraction of organic and inorganic pollutants in different types of food and environmental samples

Contact Info

Product

Resources

About