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Măruţoiu Constantin Tigae Cristian Moise Maria-Ioana Popescu Alexandru Ilea Iuliana 《平面色谱法杂志一现代薄层色谱法》2003,16(1):32-35
JPC – Journal of Planar Chromatography – Modern TLC - A stationary phase for thin-layer chromatography has been prepared by bonding purified diatomaceous earth (rich in silica) with... 相似文献
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Delia Michiu Maria-Ioana Socaciu Melinda Fogarasi Anamaria Mirela Jimborean Floricua Ranga Vlad Murean Cristina Anamaria Semeniuc 《Molecules (Basel, Switzerland)》2022,27(4)
Over the past decade, there has been growing interest in polyphenols’ research since these compounds, as antioxidants, have several health benefits, such as preventing neurodegenerative diseases, inflammation, cancer, cardiovascular diseases, and type 2 diabetes. This study implements an analytical method to assess the total phenolic content (TPC) in essential oils using Folin–Ciocalteu’s phenol reagent and quantifies the individual phenolic compounds by liquid chromatography. Thus, the research design and methodology included: (1) extraction of essential oil from dried thyme leaves by hydrodistillation; (2) spectrophotometric measurement of TPC by Folin–Ciocalteu method; and (3) identification and quantification of individual phenolic compounds by high-performance liquid chromatography-diode array detection/electrospray ionization mass spectrometry (HPLC-DAD-ESI-MS). Results revealed a TPC of 22.62 ± 0.482 mg GAE/100 µL and a polyphenolic profile characterized by phenolic acids (52.1%), flavonoids (16.1%), and other polyphenols (31.8%). Thymol, salvianolic acid A, and rosmarinic acid were the major compounds of thyme essential oil. The proposed analytical procedure has an acceptable level of repeatability, reproducibility, linearity, LOD (limit of detection), and LOQ (limit of quantification). 相似文献
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Melinda Fogarasi Maria-Ioana Socaciu Claudiu-Dan Slgean Floricua Ranga Anca Corina Frca Sonia Ancua Socaci Carmen Socaciu Dorin
ibulc Szabolcs Fogarasi Cristina Anamaria Semeniuc 《Molecules (Basel, Switzerland)》2021,26(24)
Edible mushrooms are well-known for their nutritional benefits and low energy density. In addition, mushroom extracts contain various bioactive compounds that account for their antioxidant activity; the applied extraction conditions influence the extraction efficiency of such compounds. Therefore, this study investigates the effects of four extractants on the content of polyphenols and antioxidant properties of Boletus edulis and Cantharellus cibarius mushrooms, aiming to optimize the extraction process. Powders of B. edulis and C. cibarius mushrooms were subjected to extraction with acidic water (10% CH3COOH), ethanol/water/acetic acid (15:76.5:8.5, v/v/v), hexane, and diethyl ether to measure their total phenolic content (TPC), total flavonoid content (TFC), and Trolox equivalent antioxidant capacity (TEAC). Furthermore, the level of individual polyphenolic compounds in these extracts was quantified using an HPLC-DAD-ESI-MS method. Results showed that the type of solvent significantly influenced the TPC and TEAC of mushroom powder but insignificantly influenced the TFC. A very strong positive correlation was found between TPC and TEAC, but no correlation was found between TFC and TEAC or TPC and TFC. Acidic water extracted the highest amount of polyphenolic compounds from these mushroom powders. Therefore, the aqueous extract showed the highest TPC and strongest antioxidant activity. Thus, acidic water is recommended for polyphenol analysis in B. edulis and C. cibarius mushrooms. 相似文献
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Marutoiu Constantin Gogoasa Ioan Oprean Ioan Marutoiu Olivia-Florena Moise Maria-Ioana Tigae Cristian Rada Maria 《平面色谱法杂志一现代薄层色谱法》2006,19(3):250-252
JPC – Journal of Planar Chromatography – Modern TLC - 相似文献
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Moise Maria-Ioana Marutoiu Constantin Badea Delia Nica Gavrila Cornelia-Anca Patroescu Constantin 《平面色谱法杂志一现代薄层色谱法》2004,17(2):147-148
JPC – Journal of Planar Chromatography – Modern TLC - Capsaicin was extracted from red hot pepper (Capsicum annuum) fruits and from commercial red hot pepper powder and separated on... 相似文献
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