Pressurized Liquid Extraction Combined with Dispersive Liquid-liquid Micro-extraction as an Efficient Sample Preparation Method for Determination of Volatile Components in Tobacco

2012 ◽  
Vol 59 (7) ◽  
pp. 909-916 ◽  
Author(s):  
Xiaolan Zhu ◽  
Yingbo Xu ◽  
Yun Gao ◽  
Lan Huang
Keyword(s):  
Sample Preparation ◽  
Preparation Method ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Volatile Components ◽  
Sample Preparation Method

scholarly journals Matrix-Induced Sugaring-Out: A Simple and Rapid Sample Preparation Method for the Determination of Neonicotinoid Pesticides in Honey

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2761 ◽  
Author(s):  
Wenbin Chen ◽  
Siyuan Wu ◽  
Jianing Zhang ◽  
Fengjie Yu ◽  
Jianbo Hou ◽  
...  
Keyword(s):  
Phase Separation ◽  
Sample Preparation ◽  
Preparation Method ◽  
Liquid Extraction ◽  
Subzero Temperature ◽  
Water Mixture ◽  
Sample Preparation Method ◽  
Liquid Liquid Extraction ◽  
Neonicotinoid Pesticides

In the present work, we developed a simple and rapid sample preparation method for the determination of neonicotinoid pesticides in honey based on the matrix-induced sugaring-out. Since there is a high concentration of sugars in the honey matrix, the honey samples were mixed directly with acetonitrile (ACN)-water mixture to trigger the phase separation. Analytes were extracted into the upper ACN phase without additional phase separation agents and injected into the HPLC system for the analysis. Parameters of this matrix-induced sugaring-out method were systematically investigated. The optimal protocol involves 2 g honey mixed with 4 mL ACN-water mixture (v/v, 60:40). In addition, this simple sample preparation method was compared with two other ACN-water-based homogenous liquid-liquid extraction methods, including salting-out assisted liquid-liquid extraction and subzero-temperature assisted liquid-liquid extraction. The present method was fully validated, the obtained limits of detection (LODs) and limits of quantification (LOQs) were from 21 to 27 and 70 to 90 μg/kg, respectively. Average recoveries at three spiked levels were in the range of 91.49% to 97.73%. Precision expressed as relative standard deviations (RSDs) in the inter-day and intra-day analysis were all lower than 5%. Finally, the developed method was applied for the analysis of eight honey samples, results showed that none of the target neonicotinoid residues were detected.

Salting-out-assisted liquid–liquid extraction of 5-hydroxymethylfurfural from honey and the determination of 5-hydroxymethylfurfural by high-performance liquid chromatography

2019 ◽  
Vol 11 (37) ◽  
pp. 4835-4841 ◽  
Author(s):  
Wenbin Chen ◽  
Siyuan Wu ◽  
Jianing Zhang ◽  
Fengjie Yu ◽  
Xiaoqing Miao ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Sample Preparation ◽  
High Performance ◽  
Preparation Method ◽  
Liquid Extraction ◽  
Sample Preparation Method ◽  
Salting Out ◽  
Liquid Liquid Extraction

A simple, rapid, and effective sample preparation method was developed for the recovery of 5-hydroxymethylfurfural from honey samples with negligible co-extracted sugars.

Pressurized liquid extraction as a sample preparation method for the analysis of isoflavones in pulses

2012 ◽  
Vol 404 (2) ◽  
pp. 361-366 ◽  
Author(s):  
Ma. Milagros Delgado-Zamarreño ◽  
Lara Pérez-Martín ◽  
Myriam Bustamante-Rangel ◽  
Rita Carabias-Martínez
Keyword(s):  
Sample Preparation ◽  
Preparation Method ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Sample Preparation Method

scholarly journals Application of the Dehydration Homogeneous Liquid–Liquid Extraction (DHLLE) Sample Preparation Method for Fingerprinting of Honey Volatiles

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2277
Author(s):  
Piotr M. Kuś ◽  
Igor Jerković
Keyword(s):  
Carboxylic Acid ◽  
Sample Preparation ◽  
Preparation Method ◽  
Liquid Extraction ◽  
Sample Preparation Method ◽  
Phenyllactic Acid ◽  
Homogeneous Liquid ◽  
Liquid Liquid Extraction ◽  
Wide Range ◽  
Chemical Groups

Recently, we proposed a new sample preparation method involving reduced solvent and sample usage, based on dehydration homogeneous liquid–liquid extraction (DHLLE) for the screening of volatiles and semi-volatiles from honey. In the present research, the method was applied to a wide range of honeys (21 different representative unifloral samples) to determine its suitability for detecting characteristic honey compounds from different chemical classes. GC-FID/MS disclosed 130 compounds from different structural and chemical groups. The DHLLE method allowed the extraction and identification of a wide range of previously reported specific and nonspecific marker compounds belonging to different chemical groups (including monoterpenes, norisoprenoids, benzene derivatives, or nitrogen compounds). For example, DHLLE allowed the detection of cornflower honey chemical markers: 3-oxo-retro-α-ionols, 3,4-dihydro-3-oxoedulan, phenyllactic acid; coffee honey markers: theobromine and caffeine; linden honey markers: 4-isopropenylcyclohexa-1,3-diene-1-carboxylic acid and 4-(2-hydroxy-2-propanyl)cyclohexa-1,3-diene-1-carboxylic acid, as well as furan derivatives from buckwheat honey. The obtained results were comparable with the previously reported data on markers of various honey varieties. Considering the application of much lower volumes of very common reagents, DHLLE may provide economical and ecological advantages as an alternative sample preparation method for routine purposes.

scholarly journals Determination of trans fatty acids in foodstuffs by gas chromatography-mass spectrometry after simultaneous microwave-assisted extraction-esterification

2010 ◽  
Vol 75 (6) ◽  
pp. 803-812 ◽  
Author(s):  
Snezana Kravic ◽  
Zvonimir Suturovic ◽  
Jaroslava Svarc-Gajic ◽  
Zorica Stojanovic ◽  
Mira Pucarevic
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Preparation Method ◽  
Reference Method ◽  
Gas Chromatography Mass Spectrometry ◽  
Microwave Assisted Extraction ◽  
Sample Preparation Method ◽  
Microwave Assisted ◽  
Assisted Extraction

A sample preparation method based on the simultaneous microwave-assisted extraction-esterification (SMAEE) was developed for the determination of the fatty acid composition of foodstuffs by gas chromatography-mass spectrometry. The proposed sample preparation method was validated by comparison with the reference Soxhlet extraction method followed by derivatisation by ester formation and the same determination step. The fatty acid compositions and the extraction efficiencies obtained using the proposed SMAEE method and the reference method were statistically similar. The results showed that compared to the conventional method, the SMAEE method offered the advantages of short sample preparation time, low consumption of expensive organic solvents and lower energy consumption. This good agreement between results provided by both the SMAEE and the reference method demonstrates the usefulness of the former as a routine method for the treatment of food samples prior to trans fatty analysis.

Green and efficient sample preparation method for the determination of catalyst residues in margarine by ICP-MS

Talanta ◽  
2017 ◽  
Vol 174 ◽  
pp. 394-400 ◽  
Author(s):  
Carla Andrade Hartwig ◽  
Rodrigo Mendes Pereira ◽  
Diogo La Rosa Novo ◽  
Dirce Taina Teixeira Oliveira ◽  
Marcia Foster Mesko
Keyword(s):  
Sample Preparation ◽  
Preparation Method ◽  
Sample Preparation Method ◽  
Icp Ms

A small-scale sample preparation method with HPLC analysis for determination of tocopherols and tocotrienols in cereals

2004 ◽  
Vol 17 (6) ◽  
pp. 749-765 ◽  
Author(s):  
M. Ryynänen ◽  
A.-M. Lampi ◽  
P. Salo-Väänänen ◽  
V. Ollilainen ◽  
V. Piironen
Keyword(s):  
Sample Preparation ◽  
Hplc Analysis ◽  
Preparation Method ◽  
Small Scale ◽  
Sample Preparation Method
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