Matrix solid-phase dispersion based on magnetic ionic liquids: An alternative sample preparation approach for the extraction of pesticides from vegetables

2018 ◽  
Vol 1581-1582 ◽  
pp. 168-172 ◽  
Author(s):  
Theodoros G. Chatzimitakos ◽  
Jared L. Anderson ◽  
Constantine D. Stalikas
Keyword(s):  
Ionic Liquids ◽  
Sample Preparation ◽  
Solid Phase ◽  
Magnetic Ionic Liquids ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion

scholarly journals Micro Salting-Out Assisted Matrix Solid-Phase Dispersion: A Simple and Fast Sample Preparation Method for the Analysis of Bisphenol Contaminants in Bee Pollen

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2350
Author(s):  
Jianing Zhang ◽  
Fengjie Yu ◽  
Yunmin Tao ◽  
Chunping Du ◽  
Wenchao Yang ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Preparation Method ◽  
Solid Phase ◽  
Sample Preparation Method ◽  
Salting Out ◽  
Bee Pollen ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
New Strategy ◽  
Semi Solid

In the present work, a novel sample preparation method, micro salting-out assisted matrix solid-phase dispersion (μ-SOA-MSPD), was developed for the determination of bisphenol A (BPA) and bisphenol B (BPB) contaminants in bee pollen. The proposed method was designed to combine two classical sample preparation methodologies, matrix solid-phase dispersion (MSPD) and homogenous liquid-liquid extraction (HLLE), to simplify and speed-up the preparation process. Parameters of μ-SOA-MSPD were systematically investigated, and results indicated the significant effect of salt and ACN-H2O extractant on the signal response of analytes. In addition, excellent clean-up ability in removing matrix components was observed when primary secondary amine (PSA) sorbent was introduced into the blending operation. The developed method was fully validated, and the limits of detection for BPA and BPB were 20 μg/kg and 30 μg/kg, respectively. Average recoveries and precisions were ranged from 83.03% to 94.64% and 1.76% to 5.45%, respectively. This is the first report on the analysis of bisphenol contaminants in bee pollen sample, and also on the combination of MSPD and HLLE. The present method might provide a new strategy for simple and fast sample preparation of solid and semi-solid samples.

Matrix solid-phase dispersion: a simple and fast technique for the determination of phenolic compounds in olive oil by liquid chromatography

2014 ◽  
Vol 6 (22) ◽  
pp. 8986-8995 ◽  
Author(s):  
Romina P. Monasterio ◽  
Ariel R. Fontana ◽  
María Fernanda Silva
Keyword(s):  
Liquid Chromatography ◽  
Phenolic Compounds ◽  
Sample Preparation ◽  
Olive Oil ◽  
Phenolic Compound ◽  
Solid Phase ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion

MSPD-HPLC-MWD for phenolic compound determination in olive oil was developed. It is simple and requires little sample preparation, thus increasing the throughput.

scholarly journals Sample Preparation for Determination of Macrocyclic Lactone Mycotoxins in Fish Tissue, Based on On-Line Matrix Solid-Phase Dispersion and Solid-Phase Extraction Cleanup Followed by Liquid Chromatography/Tandem Mass Spectrometry

2003 ◽  
Vol 86 (4) ◽  
pp. 729-736 ◽  
Author(s):  
Aldo Laganà ◽  
Alessandro Bacaloni ◽  
Maryanna Castellano ◽  
Roberta Curini ◽  
Ilaria De Leva ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Macrocyclic Lactone ◽  
Solid Phase ◽  
Tandem Mass ◽  
Phase Extraction ◽  
Neutral Alumina ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
On Line

Abstract A new method based on matrix solid-phase dispersion (MSPD) on-line with a solid-phase extraction (SPE) cleanup process followed by liquid chromatography with tandem mass spectrometry (LC/MS/MS) is presented for the determination of 3 macrocyclic lactone mycotoxins in fish tissues: zearalenone, α-zearalenol, and β-zearalenol. The sample was prepared in a device that used a reversed-phase material (C18) or a normal-phase material (neutral alumina) as a matrix dispersing agent, and a graphitized carbon black cartridge was used for sequential cleanup by SPE. LC/MS/MS was used for selective determination. Isocratic elution with acetonitrile–methanol–water was used for LC separation; for MS/MS, 2 types of interfaces (a pneumatically assisted electrospray ionization interface or an atmospheric pressure chemical ionization interface) were evaluated and compared in terms of the intensity of the total ion current produced by each analyte. The use of highly selective MSPD on-line with SPE for sample preparation before analysis allowed the removal of interfering matrix compounds `present in tissue extracts that would otherwise cause severeionization suppression of zearalenone and its metabolites during the ionization process. Average recoveries at 100 ng/g were between 83 and 103% with C18 and ≥67% with neutral alumina; the relative standard deviations were <11% with C18 and <18% with alumina. The limits of detection ranged from 0.1 to 1.0 ng/g. Sample preparation is simple to perform, no special technical equipment is required, and solvent volumes are minimal.

scholarly journals Magnetic Ionic Liquids in Sample Preparation: Recent Advances and Future Trends

Separations ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 153
Author(s):  
Theodoros Chatzimitakos ◽  
Phoebe Anagnostou ◽  
Ioanna Constantinou ◽  
Kalliroi Dakidi ◽  
Constantine Stalikas
Keyword(s):  
Ionic Liquids ◽  
Sample Preparation ◽  
Solid Phase ◽  
New Class ◽  
Magnetic Ionic Liquids ◽  
Current Trends ◽  
Single Drop Microextraction ◽  
Unique Nature ◽  
Dispersive Liquid Liquid Microextraction ◽  
The Many

In the last decades, a myriad of materials has been synthesized and utilized for the development of sample preparation procedures. The use of their magnetic analogues has gained significant attention and many procedures have been developed using magnetic materials. In this context, the benefits of a new class of magnetic ionic liquids (MILs), as non-conventional solvents, have been reaped in sample preparation procedures. MILs combine the advantageous properties of ionic liquids along with the magnetic properties, creating an unsurpassed combination. Owing to their unique nature and inherent benefits, the number of published reports on sample preparation with MILs is increasing. This fact, along with the many different types of extraction procedures that are developed, suggests that this is a promising field of research. Advances in the field are achieved both by developing new MILs with better properties (showing either stronger response to external magnetic fields or tunable extractive properties) and by developing and/or combining methods, resulting in advanced ones. In this advancing field of research, a good understanding of the existing literature is needed. This review aims to provide a literature update on the current trends of MILs in different modes of sample preparation, along with the current limitations and the prospects of the field. The use of MILs in dispersive liquid–liquid microextraction, single drop microextraction, matrix solid-phase dispersion, etc., is discussed herein among others.

scholarly journals DETERMINAÇÃO DE PESTICIDAS EM FEIJÃO POR DISPERSÃO DA MATRIZ EM FASE SÓLIDA (DMFS)

2003 ◽  
Vol 13 ◽  
Author(s):  
WANEIDE GOMES LOPES ◽  
HAROLDO SILVEIRA DÓREA
Keyword(s):  
Standard Deviation ◽  
Sample Preparation ◽  
Solid Phase ◽  
Small Sample ◽  
Gas Chromatograph ◽  
Analytical Methodology ◽  
Codex Alimentarius ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion

Desenvolveu-se metodologia analítica por dispersão da matriz em fase sólida (DMFS) para analisar Diazinon, Propanil, Malation, Cipermetrina e Deltametrina em amostras de feijão, testando-se o método em amostras comerciais. Amostras de feijão foram trituradas em moinho de facas e uma subamostra de 5 g foi homogeneizada com 1 g de alumina neutra. O conteúdo da mistura foi transferido para coluna DMFS e acetato de etila foi usado para eluição. O extrato final foi analisado em cromatógrafo a gás/espectrômetro de massa (CG/EM). Amostras fortificadas entre 0,5 e 4,0 mg.kg-1 apresentaram valores de recuperação (n=3) entre 72,7% e 102,1% e média da estimativa do desvio-padrão entre 29,4% e 44,7%. Os limites de detecção (LD) variaram entre 0,002 a 0,2 mg.kg-1 para os pesticidas estudados, portanto abaixo dos limites máximos de resíduos (LMR) permitidos pelo Codex Alimentarius. Na análise das amostras comerciais de feijão foram encontrados os pesticidas Diazinon, Propanil e Deltametrina em concentrações acima LMR. O método mostrou-se apropriado para pequenas quantidades de amostra, rápido e simples, com poucas etapas na preparação de amostra e pouco consumo de solvente orgânico. DETERMINATION OF PESTICIDES IN BEANS BY MATRIX SOLID PHASE DISPERSION (MSPD) Abstract An analytical methodology based on matrix solid phase disperson (MSPD) was developed to analyse Diazinon, Propanil, Malathion, Cypermethrin and Deltamethrin in beans samples, by testing the method in commercial samples. Beans samples were triturated in knives mill and one sub-sample of 5 g was homogeneized with 1 g of neutral alumine. The mixture content was transferred to MSPD column and ethyl acetate was used for elution. The final extract was analysed by gas chromatograph/mass spectromethers (CG/MS). Fortified samples between 0.5 to 4 mg.kg-1 showed recuperation values (n=3) between 72.7% and 102.1% and the standard deviation estimative average between 29.4% and 44.7%. The detection limits varied between 0.002 to 0.2 mg.kg-1 for the studied pesticides, though below the maximum limits of residues (MLR) permitted by Codex Alimentarius. In commercial beans samples analysis the pesticides Diazinon, Propanil, Malathion, Cypermethrin and Deltamethrin were found in concentration above the MLR. The methods was appropriated for small sample quantities, fast and simple, with few stages in sample preparation and low use of organic solvents.

Sign in / Sign up

Export Citation Format

Share Document