scholarly journals Direct Synthesis of ESBO Derivatives-18O Labelled with Dioxirane

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Stefano La Tegola ◽  
Cosimo Annese ◽  
Michele Suman ◽  
Immacolata Tommasi ◽  
Caterina Fusco ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Analytical Methods ◽  
Direct Synthesis ◽  
Internal Standard ◽  
Epoxidized Soybean Oil ◽  
New Approach ◽  
Food Matrices

This work addresses a new approach developed in our laboratory, consisting in the application of isolated dimethyldioxirane (DDO,1a) labelled with18O for synthesis of epoxidized glyceryl linoleate (Gly-LLL,2). We expect that this work could contribute in improving analytical methods for the determination of epoxidized soybean oil (ESBO) in complex food matrices by adopting an18O-labelled-epoxidized triacylglycerol as an internal standard.

Gas Chromatographic-Mass Spectrometric Determination of Epoxidized Soybean Oil Contamination of Foods by Migration from Plastic Packaging

1988 ◽  
Vol 71 (6) ◽  
pp. 1183-1186 ◽  
Author(s):  
Laurence Castle ◽  
Matthew Sharman ◽  
John Gilbert
Keyword(s):  
Fatty Acid ◽  
Soybean Oil ◽  
Lipid Extraction ◽  
Internal Standard ◽  
Epoxidized Soybean Oil ◽  
Gas Chromatography Mass Spectrometry ◽  
Selected Ion Monitoring ◽  
Pvc Film ◽  
Relative Standard

Abstract A method for the quantitative determination of epoxidized soybean oil (ESBO) in foods is described. The procedure involves addition of a diepoxidized fatty acid ester internal standard, followed by lipid extraction from the food and transmethylation under basic conditions. Without further cleanup, the methylated fatty acid epoxides are derivatized to form 1,3-dioxolanes, which are then determined by capillary gas chromatography-mass spectrometry with selected ion monitoring. A detection limit of 2.0 mg/kg of epoxidized soybean oil in foods and a relative standard deviation of 7% have been achieved routinely. The method has been applied successfully to the analysis of cheeses, sandwiches, cakes, and microwave-cooked meals which have been contaminated with ESBO by migration from PVC film.

Recent advancements in analytical methods for the determination of steroidal estrogen residues in environmental and food matrices

2016 ◽  
Vol 8 (28) ◽  
pp. 5556-5568 ◽  
Author(s):  
Sameera R. Gunatilake ◽  
Vihanga K. Munasinghe ◽  
Ruchiranga Ranaweera ◽  
Todd E. Mlsna ◽  
Kang Xia
Keyword(s):  
Analytical Methods ◽  
Food Samples ◽  
Steroidal Estrogen ◽  
Food Matrices

Residual steroidal estrogens in environmental and food samples have become a cause for concern as they can affect organisms at low ppt concentrations.

scholarly journals A Review of the Analytical Methods for the Determination of 4(5)-Methylimidazole in Food Matrices

Chemosensors ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 322
Author(s):  
Panagiota-Kyriaki Revelou ◽  
Marinos Xagoraris ◽  
Eleftherios Alissandrakis ◽  
Christos S. Pappas ◽  
Petros A. Tarantilis
Keyword(s):  
Mass Spectrometry ◽  
Analytical Methods ◽  
High Performance ◽  
Water Solubility ◽  
Solid Phase ◽  
Sample Pretreatment ◽  
Extraction Methods ◽  
Exchange Chromatography ◽  
Food Matrices

4(5)-Methylimidazole (4(5)MEI) is a product of the Maillard reaction between sugars and amino acids, which occurs during the thermal processing of foods. This compound is also found in foods with caramel colorants additives. Due to its prevalence in foods and beverages and its potent carcinogenicity, 4(5)MEI has received federal and state regulatory agency attention. The aim of this review is to present the extraction procedures of 4(5)MEI from food matrices and the analytical methods for its determination. Liquid and gas chromatography coupled with mass spectrometry are the techniques most commonly employed to detect 4(5)MEI in food matrices. However, the analysis of 4(5)MEI is challenging due to the high polarity, water solubility, and the absence of chromophores. To overcome this, specialized sample pretreatment and extraction methods have been developed, such as solid-phase extraction and derivatization procedures, increasing the cost and the preparation time of samples. Other analytical methods for the determination of 4(5)MEI, include capillary electrophoresis, paper spray mass spectrometry, micellar electrokinetic chromatography, high-performance cation exchange chromatography, fluorescence-based immunochromatographic assay, and a fluorescent probe.

scholarly journals A new approach for the determination of sunscreen levels in seawater by ultraviolet absorption spectrophotometry

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243591
Author(s):  
Antonio Tovar-Sánchez ◽  
Erica Sparaventi ◽  
Amandine Gaudron ◽  
Araceli Rodríguez-Romero
Keyword(s):  
Marine Environment ◽  
Spectrophotometric Method ◽  
Analytical Methods ◽  
Low Cost ◽  
Sample Pretreatment ◽  
New Approach ◽  
Spectrophotometric Procedure ◽  
Marine Life ◽  
Absorption Spectrophotometry

Sunscreen is released into the marine environment and is considered toxic for marine life. The current analytical methods for the quantification of sunscreen are mostly specific to individual chemical ingredients and based on complex analytical and instrumental techniques. A simple, selective, rapid, reproducible and low-cost spectrophotometric procedure for the quantification of commercial sunscreen in seawater is described here. The method is based on the inherent properties of these cosmetics to absorb in the wavelength of 300–400 nm. The absorption at 303 nm wavelength correlates with the concentration of most commercial sunscreens. This method allows the determination of sunscreens in the range of 2.5–1500 mg L-1, it requires no sample pretreatment and offers a precision of up to 0.2%. The spectrophotometric method was applied to quantify sunscreen concentrations at an Atlantic Beach with values ranging from 10 to 96.7 mg L-1 in the unfiltered fraction and from the undetectable value to 75.7 mg L-1 in the dissolved fraction. This method is suggested as a tool for sunscreen quantifications in environmental investigations and monitoring programs.

Determination of Surface Characteristics of Epoxidized Soybean Oil by Inverse GC

2012 ◽  
Vol 76 (1-2) ◽  
pp. 91-96 ◽  
Author(s):  
Yali Chen ◽  
Qiang Wang ◽  
Jun Tang ◽  
Zhengfang Zhang
Keyword(s):  
Soybean Oil ◽  
Surface Characteristics ◽  
Epoxidized Soybean Oil

scholarly journals Determination of Epoxidized Soybean Oil in Bottled Foods

2006 ◽  
Vol 47 (6) ◽  
pp. 243-248 ◽  
Author(s):  
Yoko KAWAMURA ◽  
Shinji KANNO ◽  
Motoh MUTSUGA ◽  
Kenichi TANAMOTO
Keyword(s):  
Soybean Oil ◽  
Epoxidized Soybean Oil
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