Authenticity Assessment of (E)-Cinnamic Acid, Vanillin, and Benzoic Acid from Sumatra Benzoin Balsam by Gas Chromatography Combustion/Pyrolysis Isotope Ratio Mass Spectrometry.

Authenticity assessment of ()-cinnamic acid, vanillin, and benzoic acid from various origins ( = 26) was performed using gas chromatography-isotope ratio mass spectrometry coupled with combustion and pyrolysis mode (GC-C/P-IRMS). For that reason, the above three compounds (1-3) from synthetic, natural, and Sumatra benzoin balsam (laboratory prepared, adulterated, and commercial) were investigated. The C and H values for compounds 1-3 from synthetic samples (S1-S5) ranging from -26.

GC-MS combined with multivariate analysis for the determination of the geographical origin of Hemsl. in Yunnan province.

Hemsl., a Chinese herbal medicine, may have the potential to treat COVID-19. The geographical origin has a significant influence on the quality and application of In this paper, gas chromatography-mass spectrometry (GC-MS) combined with principal component analysis (PCA) and hierarchical cluster analysis (HCA) and other multivariate statistical analyses were performed for the identification of origins.

Adsorption and controlled release of three kinds of flavors on UiO-66.

Delivery systems for controlled release of fragrances are significantly essential in the flavor and fragrance industry due to a limited life span (premature evaporation and degradation) of fragrance compounds. Recently, several adsorption materials such as porous materials have been developed in delivery systems for targeted fragrance release. In this work, UiO-66, a member of metal-organic framework (MOF) family with high porosity and greater adsorbability, was selected as a prospective alternative to traditional porous adsorbents for controlled release of fragrances.

[Investigation of the pyrolysis behavior of 4-oxo-beta-damascone by on-line pyrolysis gas chromatography-mass spectrometry].

The pyrolysis behavior of an essence, 4-oxo-beta-damascone, was investigated using an on-line pyrolysis gas chromatography-mass spectrometry (PyGC/MS). In helium atmosphere, the compound was pyrolyzed at 350, 450, 550, 650, 700, and 750 degrees C, separately. The pyrolysis products were directly introduced into GC/MS with 1.