April 7th 2025
A multidimensional liquid chromatography (LC)-based technique was created to help profile antioxidant metabolites in onion leaf extracts.
Analyzing Edible Fats and Oils with Gas and Liquid Chromatography
October 29th 2013An interview with Hans-Gerd Janssen of Unilever Research and Development Vlaardingen and the University of Amsterdam. Janssen is involved with method development for gas chromatography, liquid chromatography, and mass spectrometry; the development of instrumentation for multidimensional chromatography for food analysis and biomacromolecular characterization; and problem solving and efficient routine analysis of foods (particularly oils and fats). This interview discusses the challenges encountered in the analysis of fats and oils, how multidimensional chromatography can be applied to the analysis, 2D LC for food-related compound analysis, the analysis of natural antioxidants in edible oils, and future steps in his research.
Compounds in Honey Key to Activation of Detoxification Genes in Honey Bees
June 21st 2013Three scientists from the University of Illinois (Illinois, USA) have detected key compounds in honey using high performance liquid chromatography (HPLC) that can up-regulate detoxification genes. HPLC was performed on ethyl acetate honey samples identifying four compounds that induce detoxification genes, potentially required for the detoxification of pesticides.
Analysis of Pesticides in Baby Food Using Triple-Quadrupole GC–MS-MS
June 1st 2013Contamination of food products with pesticides is a growing concern because of recognized damaging health effects. This concern is particularly acute for baby foods because of the vulnerability of young children to harmful effects of synthetic chemicals, particularly pesticides. This application note presents results for analysis of trace levels of 24 organophosphorus (OP) pesticides in baby foods using the Shimadzu GCMS-TQ8030 triple quadrupole GC–MS-MS.
Determination of Additives in Beverages Using Ascentis Express Columns
June 1st 2013Beverages, such as sodas and energy drinks, can include a number of polar ingredients, which are easily soluble in the water matrix of the drinks. These ingredients include sweeteners (sugars and sugar substitutes), caffeine, vitamin supplements, amino acids, organic acids, and plant extracts. Because the analytes are already in solution, there is no need for extensive sample preparation. Dilution followed by direct injection into an HPLC is typically suitable.
Analysis of Methylimidazoles in Caramel-Colored Carbonated Beverages
June 1st 2013Caramel colorings are used as additives in a broad range of food and beverage products, but have no nutritional or preservative function. Recently, the potential hazard to humans of ammonia- and ammonia-sulfite-process caramel colorings was raised, because they contain the by-product 4-methylimidazole, which is a potential carcinogen (1).