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Extraction of esters

Urine (BAA) Adjustment of urine to pH 7 addition of 3-cliloropropionic acid (internal standard) and lyophilization overnight. Dissolution of residue in metlianol containing pentafluorobenzyl bromide followed by equilibration at 90 C for 3 hours. Addition of water and extraction of esters with dichloromethane. GC/FID 0.03 mg/L (0.03 ppm, w/v) 95.1% (average of3.5%RSD) Groeseneken et al. 1989... [Pg.353]

Figure 2.1-13 Scheme of the continuous extraction of esters (eicosapentanoic acid (EPA)/docosahexanoic acid (DHA)) [51]. [Pg.85]

Cg-Ci8 alkyl mono- and diethanolamides alkyl chain length distribution Formation of methyl esters by reaction with CHCI3/ Me0H/H2S04 under pressure at 185-C, followed by extraction of esters 10% PEG adipate on Celite, 4 ft 170 TC 82... [Pg.325]

See other pages where Extraction of esters is mentioned: [Pg.17]    [Pg.160]   
See also in sourсe #XX -- [ Pg.85 , Pg.85 , Pg.103 ]



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