Two flavors in adulterated sesame oil: discovery, confirmation, and content regularity study.

Exploring and accurately detecting new adulteration markers in sesame oil is an important measure for sesame oil adulteration monitoring. In this study, two endogenous flavors sulfurol and γ-nonalactone which can be used as potential adulteration markers were first discovered in sesame oil and accurately quantified. First, the two endogenous flavors were discovered using gas chromatography-mass spectrometry (GC-MS), and their structures were confirmed by comparing the mass spectrograms with the NIST spectral library.

Rapid recognition and targeted isolation of potential anti-breast cancer xanthones in Hypericum bellum Li by "seed" mass spectra-based molecular networking and in silico MS/MS fragmentation.

Instruction: Hypericum bellum Li is rich in xanthones with various bioactivities, especially in anti-breast cancer. While the scarcity of mass spectral data of xanthones in Global Natural Products Social Molecular Networking (GNPS) libraries have challenged the rapid recognition of xanthones with similar structures.

Objective: This study is aimed to enhance the molecular networking (MN)-based dereplication and visualisation ability of potential anti-breast cancer xanthones from H.

[Simultaneous determination of monosaccharides and oligosaccharides in Lycium barbarum L. by high performance liquid chromatography].

Objective: To develop a rapid approach of refractive index detection with high performance liquid chromatography (HPLC) for the determination of rhamnose, fructose, glucose, surose and maltose in Lycium barbarum L.

Methods: The sample was extracted with water and the analyte was separated by Zorbax Carbohydrate column with acetonitrile-water as mobile phase.

Results: Good linear correlations between the concentrations and the peak areas of the analyte were found, with the correlation coefficients ranging from 0.

[Determination of 4-nonylphenol and bisphenol A in rat serum by high performance liquid chromatography with fluorescence detection].

Objective: This study was directed to the development of a simple and highly sensitive method for determination of 4-nonylphenol (4-NP) and bisphenol A (BPA) in rat serum using HPLC with fluorescence detector.

Methods: 4-NP and BPA in serum samples were extracted by a mixed solvent of n-hexane and diethyl ether (70:30), the organic layer was dried with nitrogen flow and dissolved with mobile phase. The operating conditions such as C18 column (250 mm x 4.