Identification of VOCs from natural rubber by different headspace techniques coupled using GC-MS was written by Kamarulzaman, Nor H.;Le-Minh, Nhat;Stuetz, Richard M.. And the article was included in Talanta in 2019.COA of Formula: C8H16O2 The following contents are mentioned in the article:
Different extraction procedures were evaluated to assess their potential for measuring volatile organic compounds (VOCs) from raw rubber materials. Four headspace sampling techniques (SHS, DHS, HS-SPME and μ-CTE) were studied. Each method was firstly optimized to ensure their reliability in performance. Passive sampling was also compared as a rapid identification of background VOCs. 352 VOCs were identified, 71 from passive sampling and 281 from active headspace sampling, with 62 not previously reported (hexanenitrile, octanone, decanal, indole, aniline, anisole, alpha-pinene as well as pentanol and butanol). The volatiles belonged to a broad range of chem. classes (ketones, aldehydes, aromatics, acids, alkanes, alc. and cyclic) with their thermal effects (lower b.ps.) greatly affecting their abundance at a higher temperature Micro-chamber (μ-CTE) was found to be the most suitability for routine assessments due to its operational efficiency (rapidity, simplicity and repeatability), identifying 115 compounds from both temperatures (30 °C and 60 °C). Whereas, HS-SPME a widely applied headspace technique, only identified 75 compounds and DHS identified 74 VOCs and SHS only 17 VOCs. Regardless of the extraction technique, the highest extraction efficiency corresponded to aromatics and acids, and the lowest compound extraction were aldehyde and hydrocarbon. The interaction between techniques and temperature for all chem. groups were evaluated using two-way ANOVA (p-value is 0.000197) explaining the highly significant interactions between factors. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0COA of Formula: C8H16O2).
Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.COA of Formula: C8H16O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics