1,721,178 research outputs found
Coumarins, Psoralens and Polymethoxyflavones in Cold-pressed Citrus Essential Oils: a Review
No full textCold-pressed Citrus essential oils namely lemon, bergamot, lime, grapefruit, mandarin, sweet and bitter orange are obtained from the peel of Citrus fruits. They were normally used in food, cosmetic, and pharmaceutical industries as ingredients. Essential oils extraction processes produce oils with different sensory qualities, and often these processes are expensive and have a low yield. For such a reason adulteration process are frequent, so careful attention must be paid to ensure the oils' genuineness and authenticity. Moreover, psoralen levels are continuously monitored by opinions and regulations released from International Fragrance Association and the European Parliament due to their photoactivity.
This review aims to browse the scientific literature of the past 30 years on the characterization of the non-volatile fraction of cold-pressed Citrus essential oils to discuss results achieved so far and highlight future prospect
A comprehensive gas chromatography system with flow modulation under vacuum conditions
No full textThe invention relates to the exploitation of low pressure conditions in the second analytical dimension of flow-modulated comprehensive two-dimensional gas chromatography (GCxGC) systems to reduce the requirements of high gas flows exiting the modulator. The invention specifically relates to flow modulators (3) characterized by the necessity of high gas flows (e.g.,>10 mL/min), to efficiently release effluent accumulated from the first column (12), onto the second column (20). The use of a second analytical column (20), with an internal diameter (ID) equal to, or exceeding 0.30 mm (e.g., 0.32 mm, 0.53 mm), along with vacuum outlet conditions, reduces the pressure conditions inside the second analytical column. Such intra-column low pressure conditions enables efficient release of effluent from the modulator, using lower gas flows (e.g., 7-8 mL/min)
Differentiation of Italian extra virgin olive oils by rapid evaporative ionization mass spectrometry
Full text linkComprehensive 2D GC combined with novel MS instrumentation: powerful unified tools for the analysis of complex samples
No full textComprehensive Two-Dimensional Gas Chromatography Combined with Single and Triple Quadrupole Mass Spectrometry: Powerful Unified Tools for the Analysis of Food Volatiles
No full text
Advances in LC-MS for food analysis
No full textWithin the wide host of hyphenated techniques, liquid chromatography-mass spectrometry (LCMS) has recently emerged to a central role in different fields, including food analysis. In this review, the most recent LC-MS approaches are overviewed; technical requirements for linkage of an LC system to an MS one, are also briefly discussed. In addition, advantages to be gained by the employment of on-line 2DLC in the “comprehensive” mode are illustrated, as well as selected applications for the analysis of most common foodstuffs, namely triacylglycerols, carotenoids, and polyphenols. Finally, future trends toward the use of LC-MS in the food field are reported
Flow-modulated GC × low-pressure-GC: a novel approach fro high resolution/sensitivity separations in gas chromatography
No full textGC multidimensionale “comprehensive” con modulazione a flusso: è questo il futuro delle separazioni GC ad alta risoluzione?
No full text- …
