Comparison of sampling efficiency and storage stability on different sorbents for determination of solvents in occupational air was written by Gjolstad, Merete;Bergemalm-Rynell, Kerstin;Ljungkvist, Goeran;Thorud, Syvert;Molander, Paal. And the article was included in Journal of Separation Science in 2004.Application In Synthesis of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:
This study describes the sampling efficiency and storage stability of compounds typically present in occupational atms. on the sorbents Anasorb CSC, Anasorb 747, and Chromosorb 106. The selection of compounds included in the study contained aliphatic and aromatic hydrocarbons, alcs., esters, glycol ethers, ketones, and halogenated compounds, thus representing a wide range of chem. and phys. properties. The different sorbent tubes were simultaneously exposed to the selected compounds as three different mixtures of solvent vapors in air, and storage both at room temperature and at -22掳 was studied. The sorbent tubes were stored and analyzed at two different laboratories The sampling efficiencies of all the studied compounds were excellent on Anasorb CSC and Anasorb 747, while Chromosorb 106 did not give such good results for the most volatile compounds under study. The room temperature storage stability on Chromosorb 106, however, was good for all compounds, although formation of artifacts was observed during storage, a disadvantage that was substantially reduced by storage at -22掳. The room temperature storage stability on Anasorb CSC was good for all compounds except some of the ketones. The room temperature storage stability of these ketones, especially cyclohexanone and 2-butanone, was much better on Anasorb 747, which still showed the same excellent storage stability for the remaining compounds When stored in a freezer, the storage stability of all compounds, including the ketones, was very good on all sorbents. Among the sorbents under study, Anasorb 747 appears to be the most suitable allround sorbent for monitoring volatile compounds in occupational air, with satisfactory capabilities regarding both sampling efficiency and storage stability. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Application In Synthesis of Ethyl 3-ethoxypropanoate).
Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Application In Synthesis of Ethyl 3-ethoxypropanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics