scholarly journals Silver-coated monolitic silica column for separation of benzo[a]pyrene from petroleum

Chemija ◽  
2021 ◽  
Vol 32 (2) ◽  
Author(s):  
Vilius Poškus ◽  
Vida Vičkačkaitė ◽  
Justina Rokaitė
Keyword(s):  
Silver Nanoparticles ◽  
Organic Solvent ◽  
Chromatographic Analysis ◽  
Solid Phase ◽  
Extraction Column ◽  
Phase Extraction ◽  
Sorbent Surface ◽  
Electronic Interactions ◽  
Silica Column ◽  
Specific Retention

Monolithic silica solid-phase extraction column has been successfully applied for the rapid fractionation and subsequent gas chromatographic analysis of benzo[a]pyrene from the diesel and oil matrix. Due to π-π electronic interactions between silver nanoparticles on the sorbent surface and aromatic analyte specific retention was achieved. It was demonstrated that only 0.2 g of the sorbent and 6 ml of the organic solvent are enough for such separation.

Development of a solid-phase extraction – spectrofluorimetric method for trace glutathione determination

2011 ◽  
Vol 89 (4) ◽  
pp. 517-523 ◽  
Author(s):  
Ke-Jing Huang ◽  
Cong-Hui Han ◽  
Ying-Ying Wu ◽  
Chao-Qun Han ◽  
De-Jun Niu ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Limit Of Detection ◽  
Solid Phase ◽  
Signal To Noise Ratio ◽  
Calibration Graph ◽  
Extraction Column ◽  
Phase Extraction ◽  
Selective Reaction ◽  
Spectrofluorimetric Method ◽  
Relative Standard

A simple and efficient solid-phase extraction – spectrofluorimetric method has been developed to determine glutathione (GSH). Fluorescent probe N-(4,4-difluoro-5,7-dimethyl-4-bora-3a,4a-diaza-s-indacene-3-yl)methyl)iodoacetamide (BODIPY Fl-C1-IA) was used as the derivatization reagent. The procedure was based on a BODIPY Fl-C1-IA selective reaction with GSH to form the highly fluorescent product BODIPY Fl-C1-IA–GSH, using a solid-phase extraction column and spectrofluorimetric determination. The variables affecting analytical performance were studied and optimized. The calibration graph using the preconcentration system for GSH was linear over the range of 1–200 nmol/L with a limit of detection of 0.05 nmol/L (signal-to-noise ratio = 3). The relative standard deviation for six replicate determinations of GSH at the 100 nmol/L concentration level was 3.9%. The method was applied to water samples and average recoveries between 87.5% and 111.5% were obtained for spiked samples.

Rapid and simple determination of nicorandil in rat plasma using a solid-phase extraction column

1990 ◽  
Vol 528 ◽  
pp. 509-516 ◽  
Author(s):  
Yutaka Gomita ◽  
Katsushi Furuno ◽  
Kohei Eto ◽  
Tamotsu Fukuda ◽  
Yasunori Araki ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Rat Plasma ◽  
Extraction Column ◽  
Phase Extraction ◽  
Solid Phase Extraction Column

scholarly journals Molecular Imprinted of Nylon 6 for Selective Separation of Procaine by Solid-Phase Extraction

2021 ◽  
Vol 21 (6) ◽  
pp. 1505
Author(s):  
Muhammed Emad Abood ◽  
Sumayha Muhammed Abbas
Keyword(s):  
Solid Phase Extraction ◽  
Recovery Rate ◽  
Separation Efficiency ◽  
Solid Phase ◽  
Nylon 6 ◽  
Extraction Column ◽  
Phase Extraction ◽  
Mixed Solution ◽  
Imprinted Polymer ◽  
Drug Compound

The study is based on the selective binding ability of the drug compound procaine (PRO) on a surface imprinted with nylon 6 (N6) polymer. Physical characterization of the polymer template was performed by X-ray diffraction and DSC thermal analysis. The imprinted polymer showed a high adsorption capacity to trap procaine (237 µg/g) and excellent recognition ability with an imprinted factor equal to 3.2. The method was applied to an extraction column simulating a solid-phase extraction to separate the drug compound in the presence of tinoxicam and nucleosimide separately and in a mixture of them with a recovery rate more than the presence of tinoxicam and nucleosimide separately and in a mixture of them with a recovery rate of more than 82%. Separation efficiency and excellent selectivity for procaine were ensured using a mixed solution injected into an HPLC technique consisting of a C18 column with a mobile phase mixture of water-acetonitrile (75:25) at pH 3.3. The study of drug control using an imprinted polymer with procaine compound showed that the complete drug release process is faster at pH1 in a maximum period of 80 min. The proposed method was successfully applied on some of the available pharmaceuticals, and it showed high selectivity for the separation of PRO, RE % was < 1.18, and RSD was less than 0.447.

scholarly journals Detection of Hazelnut Oil in Virgin Olive Oil by Assessment of Free Sterols and Triacylglycerols

2001 ◽  
Vol 84 (5) ◽  
pp. 1534-1542 ◽  
Author(s):  
Stefania Vichi ◽  
Lorena Pizzale ◽  
Emilio Toffano ◽  
Renzo Bortolomeazzi ◽  
Lanfranco Conte
Keyword(s):  
Olive Oil ◽  
Solid Phase ◽  
Virgin Olive Oil ◽  
Hazelnut Oil ◽  
Phase Extraction ◽  
Silica Column ◽  
Free Sterols ◽  
Oil Fractions ◽  
Triacylglycerol Analysis ◽  
Statistical Certainty

Abstract Free sterols were evaluated as factors for discriminating between genuine virgin olive oil and hazelnut-mixed virgin olive oil. Numeric analyses of the results amplified the differences between groups. The application of this method to virgin olive oil samples and their mixtures with 10% hazelnut oil distinguished between genuine and nongenuine virgin olive oil with statistical certainty. Triacylglycerol analysis was tested for the same purpose by using parameter ΔECN42, but although it possessed a discriminating capacity, it alone could not distinguish the aforementioned groups with sufficient certainty. Free Δ7-sterols data were combined with ΔECN42 data into a single discriminating function to improve differentiation and bring more ruggedness, and for detection of low amounts (10%) of hazelnut oil in virgin olive oil. In fact, the values obtained by addition of Δ7-sterol data and ΔECN42 data showed a higher discriminating capacity than single parameters. In a single operation the method produced all the oil fractions necessary for analysis of free sterols and triacylglycerols with ECN42. Solid-phase extraction was applied in substitution of traditional chromatography on a silica column.

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