Molecularly imprinted-solid phase extraction combined with simultaneous derivatization and dispersive liquid–liquid microextraction for selective extraction and preconcentration of methamphetamine and ecstasy from urine samples followed by gas chromatography

Djozan, Djavanshir; Farajzadeh, Mir Ali; Sorouraddin, Saeed Mohammad; Baheri, Tahmineh

doi:10.1016/j.chroma.2012.05.085

Cited by 103 publications

(40 citation statements)

References 29 publications

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“…Table 2 compare the proposed method with the other extraction methods for the determination of the target analytes in urine samples. The quantitative results of the proposed method are better than the molecularly imprinted-solid phase extraction with simultaneous derivatization and DLLME-GC-FID [35] without using derivatization method. The comparison of extraction time of the proposed method with solid-phase microextraction (SPME) [25] and microwave-assisted extraction (MAE) [36] for the extraction of the target analytes indicates that this novel method has a short extraction time of only one minute, which results in better quantitative results than the SPME and MAE methods.…”

Section: Analytical Methods Performancementioning

confidence: 78%

Solid-phase extraction followed by dispersive liquid-liquid microextraction for the sensitive determination of ecstasy compounds and amphetamines in biological samples

Mashayekhi¹,

Rezaee²,

Khalilian³

2014

Bull. Chem. Soc. Eth.

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ABSTRACT. A novel approach for the determination of ecstasy and amphetamines (3,4-methylenedioxymethylamphetamine (MDMA, Ecstasy), 3,4-methylenedioxyamphetamine (MDA), 3,4-methylenedioxyethylamphetamine (MDEA) and 3,4-methylenedioxypropylamphetamine (MDPA)) in biological samples is presented. The analytes were extracted from the matrix and transferred to a small volume of a high density, water insoluble solvent using solid-phase extraction (SPE) followed by dispersive liquid-liquid microextraction (DLLME). This combination not only resulted in a high enrichment factor, but also it could be used in complex matrices (biological samples). Some important extraction parameters, such as sample solution flow rate, sample pH, type and volume of extraction and disperser solvents as well as the salt addition, were studied and optimized. Under the optimized conditions, the calibration graphs were linear in the range of 0.5-500 µg L -1 and 1.0-500 µg L -1 with detection limits in the range of 0.1-0.3 µg L -1 and 0.2-0.7 µg L -1 in urine and plasma samples, respectively. The results showed that SPE-DLLME is a suitable method for the determination of ecstasy components and amphetamines in biological and water samples.

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Section: Analytical Methods Performancementioning

confidence: 78%

Solid-phase extraction followed by dispersive liquid-liquid microextraction for the sensitive determination of ecstasy compounds and amphetamines in biological samples

Mashayekhi¹,

Rezaee²,

Khalilian³

2014

Bull. Chem. Soc. Eth.

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“…In order to determine trace level of pesticide residues, an extraction and preconcentration step is necessary. Traditional liquid-liquid extraction (LLE) and solid phase extraction (SPE) are the most popular procedures in routine sample preparation because of their simplicity, efficiency, and wide acceptance in many standard methods [3][4][5][6][7][8][9][10][11]. However, LLE technique is timeconsuming, requires large amounts of toxic organic solvents, and provides low enrichment of analytes.…”

Section: Introductionmentioning

confidence: 99%

Development of counter current salting-out homogenous liquid–liquid extraction for isolation and preconcentration of some pesticides from aqueous samples

Farajzadeh

Feriduni

Mogaddam

2015

Analytica Chimica Acta

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“…However, one single pretreatment technique often cannot meet the requirements of trace and ultra-trace analysis, especially in complicated matrices. Recently, multi-pretreatment techniques have been proposed based on MIPs and applied for biological and food samples, [429][430][431] such as MISPE-DLLME [432][433][434] and MI-MSPD-DLLME. 435 DLLME based on a ternary component solvent system has several advantages such as short extraction and equilibrium time, less organic solvent consumption, high recovery and an enhanced enrichment factor.…”

Section: 425mentioning

confidence: 99%

Molecular imprinting: perspectives and applications

et al. 2016

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a Molecular imprinting technology (MIT), often described as a method of making a molecular lock to match a molecular key, is a technique for the creation of molecularly imprinted polymers (MIPs) with tailor-made binding sites complementary to the template molecules in shape, size and functional groups. Owing to their unique features of structure predictability, recognition specificity and application universality, MIPs have found a wide range of applications in various fields. Herein, we propose to comprehensively review the recent advances in molecular imprinting including versatile perspectives and applications, concerning novel preparation technologies and strategies of MIT, and highlight the applications of MIPs. The fundamentals of MIPs involving essential elements, preparation procedures and characterization methods are briefly outlined.Smart MIT for MIPs is especially highlighted including ingenious MIT (surface imprinting, nanoimprinting, etc.), special strategies of MIT (dummy imprinting, segment imprinting, etc.) and stimuli-responsive MIT (single/dual/ multi-responsive technology). By virtue of smart MIT, new formatted MIPs gain popularity for versatile applications, including sample pretreatment/chromatographic separation (solid phase extraction, monolithic column chromatography, etc.) and chemical/biological sensing (electrochemical sensing, fluorescence sensing, etc.). Finally, we propose the remaining challenges and future perspectives to accelerate the development of MIT, and to utilize it for further developing versatile MIPs with a wide range of applications (650 references).

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Molecularly imprinted-solid phase extraction combined with simultaneous derivatization and dispersive liquid–liquid microextraction for selective extraction and preconcentration of methamphetamine and ecstasy from urine samples followed by gas chromatography

Cited by 103 publications

References 29 publications

Solid-phase extraction followed by dispersive liquid-liquid microextraction for the sensitive determination of ecstasy compounds and amphetamines in biological samples

Solid-phase extraction followed by dispersive liquid-liquid microextraction for the sensitive determination of ecstasy compounds and amphetamines in biological samples

Development of counter current salting-out homogenous liquid–liquid extraction for isolation and preconcentration of some pesticides from aqueous samples

Molecular imprinting: perspectives and applications

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