Poly(methacrylic acid-ethylene glycol dimethacrylate) monolith in-tube solid phase microextraction coupled to high performance liquid chromatography and analysis of amphetamines in urine samples

Yi, Fan; Feng, Yu‐Qi; Zhang, Jiantao; Da, Shi‐Lu; Zhang, Min

doi:10.1016/j.chroma.2005.03.115

Cited by 123 publications

(27 citation statements)

References 31 publications

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“…4, the extraction efficiencies were higher at pH value around 5.0 for p-NP, around 8.0 for most phenolic compounds. This interesting trend indicated that not only the hydrophobic interaction but also the ion-exchange interaction contributed to the extraction [36]. Because the extraction efficiency for p-NP at pH 8.0 was only little lower than at pH 5.0, setting the pH value of matrix at 8.0 was recommended for extracting phenolic compounds in water sample with VPDBcoated stir bar.…”

Section: The Effect Of Ph Valuementioning

confidence: 99%

Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididone‐divinylbenzene) monolith

Huang¹,

Qiu

Yuan

2009

J of Separation Science

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Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididonedivinylbenzene) monolith An effective and simple method for polar phenols in water matrix was developed by using stir bar sorptive extraction (SBSE) based on a hydrophilic poly(vinylpyrrolididone-divinylbenzene) (VPDB) monolithic material and HPLC analysis. To achieve optimum extraction performance for phenols, several parameters, including extraction and desorption time, desorption solvent, pH value, and ionic strength of sample matrix, were investigated. Under the optimized experimental conditions, eight phenols were directly enriched from water samples and analyzed by HPLC-DAD. The detection limits (S/N = 3) and quantification limits (S/N = 10) of the proposed method for the target compounds were achieved within the range of 0.72 -1.37 and 2.40 -4.27 ng/mL from spiked water, respectively. Recoveries of eight phenolic compounds were found in the range of 55.2 -95.9%. The calibration curves showed the linearity ranging from 5 to 150 ng/mL with linear regression coefficient R 2 values above 0.98. Method repeatability presented as intra-and interday precisions were also found with the RSDs less than 4.10 and 7.61%, respectively. The distribution coefficients between VPDB and water (K VPDB/W ) for phenolic compounds were also calculated and compared with K O/W . Finally, the proposed method was successfully applied to the determination of the target compounds in tap water, sea water and wastewater samples.

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Section: The Effect Of Ph Valuementioning

confidence: 99%

Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididone‐divinylbenzene) monolith

Huang¹,

Qiu

Yuan

2009

J of Separation Science

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“…Thus, the SPME fiber coatings with such properties are definitely in demand; the efforts in this field should be further strengthened. The research on monolith materials is a hot topic in analytical chemistry in recent years, but their application in the SPME field is very limited (101,102). However, we believe that the SPME fiber coatings based on monolith materials should have a bright future because of their unique properties, such as very rapid extraction kinetics, high extraction effect, and good compatibility with biological samples.…”

Section: Resultsmentioning

confidence: 99%

Progress of Solid‐Phase Microextraction Coatings and Coating Techniques

et al. 2006

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(SPME) has been popular as an environmentally friendly sample pretreatment technique to extract a very wide range of analytes. This is partly owing to the development of SPME coatings. One of the key factors affecting the extraction performances, such as the sensitivity, selectivity, and reproducibility, is the properties of the coatings on SPME fibers. This paper classifies the materials used as SPME coatings and introduces some common preparation techniques of SPME coating in detail, such as sol-gel technique, electrochemical polymerization technique, particle direct pasting technique, restricted access matrix SPME technique, and molecularly imprinted SPME technique. IntroductionSolid-phase microextraction (SPME) is a sample preparation technique developed by Pawliszyn et al. (1,2). The process of SPME includes two major operation steps: extraction and desorption. Because both extraction and desorption take place on the coatings, the properties of the coatings determine the performance of SPME. Based on this fact, the development of new coatings has been in great demand for a long time. In recent years, the quantity of papers discussing new coatings for SPME has increased rapidly. In this paper, many of the present coatings are classified, and the common preparation techniques are described in detail. Discussion The classifying of coatingsIn the book Applications of Solid-Phase Microextraction, Górecki (3) sorted the coatings from Supelco (Bellefonte, PA) into two different categories: high-viscosity liquid coatings and solid coatings. He also described the extraction mechanism for both kinds of coatings, respectively. For liquid coatings, the extraction of analytes is obtained by the absorption, in which the analytes can transfer from the surface of coatings to the inside. This kind of coating includes the common stationary phases polydimethylsiloxane (PDMS) and polyacrylate (PA). For solid coatings, the extraction of analytes is based on adsorption, in which the analytes may only stay on the surface of the coatings. Some composite coatings such as PDMS-divinylbenzene (DVB), carbowax-DVB, carbowax-templete resin, etc. from Supelco are solid coatings with porous surfaces. They can only extract analytes by adsorption. During the extraction process, the mechanism of adsorption is much more complex than absorption.With the development of the SPME technique, more and more new materials are utilized in the preparation of coatings. More than half of currently available coatings are solid coatings. However, they are divided by the properties of the materials; the solid coatings are multifarious. Based on organic and inorganic types, there are two primary kinds of coatings: organic and inorganic. Organic coatingOrganic polymer materials are the first kind of material used as SPME coatings. Because traditional SPME fibers utilize fusedsilica fiber as solid-phase carriers, compared with inorganic materials, organic polymer materials are easier to affix with fiber. In addition, at high temperature, the thermal coefficien...

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“…Specific capture means that molecularly imprinted polymer is able to adsorb substance from unary solution. Selective capture means that polymer will adsorb substance present in multicomponent mixture [15]. Authors selected acetonitrile as porogen since it creates sponge-like structure of MIP's and helps create micro pores [6,7,10].…”

Section: Porogenmentioning

confidence: 99%

“…It can be ensured basing on acid/base properties of functional monomer. The most common in used acid monomers are: acrylic acid, methacrylic acid or 4-vinylbenzoic acid [15]. Carboxylic groups attract other molecules and donor or acceptor hydrogen bonds or by dipoledipole affecting create an ion-pair [7][8][9].…”

Section: Choosing a Functional Monomermentioning

confidence: 99%

Preparation and characterization of polymers imprinted molecularly with ibuprofen and nitrobenzene

Wasiniak

Łukaszewicz

2010

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Poly(methacrylic acid-ethylene glycol dimethacrylate) monolith in-tube solid phase microextraction coupled to high performance liquid chromatography and analysis of amphetamines in urine samples

Cited by 123 publications

References 31 publications

Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididone‐divinylbenzene) monolith

Development and validation of stir bar sorptive extraction of polar phenols in water followed by HPLC separation in poly(vinylpyrrolididone‐divinylbenzene) monolith

Progress of Solid‐Phase Microextraction Coatings and Coating Techniques

Preparation and characterization of polymers imprinted molecularly with ibuprofen and nitrobenzene

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