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Ethyl-phenol acetic acid content

Phenolic and acidic pesticides and herbicides were chromatographed as chloromethyl and bromomethyldimethylsilyl derivatives [502] and the entire procedure was applied to the analysis of these substances in soil, as follows. A 1-ml volume of n-hexane, 0.075 ml of dimethylamine and 0.09 ml of halomethyldimethylchlorosilane were mixed in a 5-ml vial, which was then closed and shaken vigorously. The mixture was centrifuged and 0.4 ml of the supernatant was transferred into an 8-ml test tube and 0.1 ml of ethyl acetate containing 100 jug of the substrate was added. The contents were refluxed for 30 min at 65°C, cooled and the reflux condenser was rinsed with 0.5 ml of n-hexane. [Pg.182]

Table 13.25. Acetic acid, ethyl acetate, and ethyl-phenol content of a red wine aged under various conditions. (After 12 months aging with the bung on the side blend of 83 barrels for each condition) (Chatonnet et al., 1993b)... Table 13.25. Acetic acid, ethyl acetate, and ethyl-phenol content of a red wine aged under various conditions. (After 12 months aging with the bung on the side blend of 83 barrels for each condition) (Chatonnet et al., 1993b)...
These results concurred with the findings of Thiyam et al. (2006a) that rapeseed meal extracts contained free sinapic acid, which was equivalent to just one-tenth of the content of sinapine. This was further illustrated by the Iree-phenolic fractions of the meal extracts that could recover the free sinapic acid safisfactorily. Usually in analysis, the phenofic extracts are hydrolysed with NaOH and the released-phenolics are extracted with diethyl ether, ethyl acetate or both. Comparisons between the aqueous fraction (rich in sinapine) before and after hydrolysis producing the released fraction (rich in sinapic acid) showed reasonable results with minimum hydrolysis losses affecting the accuracy of the process. Additionally, fiactionation of the 70% methanolic extract showed comparable extraction efficiency to the original extract before fractionation. [Pg.282]


See other pages where Ethyl-phenol acetic acid content is mentioned: [Pg.64]    [Pg.69]    [Pg.268]    [Pg.80]    [Pg.461]    [Pg.60]    [Pg.89]    [Pg.621]    [Pg.226]    [Pg.228]    [Pg.226]    [Pg.65]    [Pg.258]    [Pg.821]    [Pg.128]   
See also in sourсe #XX -- [ Pg.426 ]




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