was dried under nitrogen gas before fractionation.
2] resin strips were placed in each of the remaining 40 mL of solution and shaken for 2 h before being removed, rinsed, and placed in 10 mL of eluant
solution as described above.
Another interesting component is 2-phenylethanol, which is found in the eluants
of all the beers.
were concentrated (via nitrogen evaporation) and the Aroclors were further isolated from the oil matrix using a semi-preparative aminopropylsilane column using hexane as the mobile phase [36, 37].
were combined and concentrated with a rotary evaporator, and internal standard 2,2',3,4,4',5,6,6'-octachlorobiphenyl (PCB 204) was added.
Blank plasma samples were extracted as described above, and the derived methanolic eluants
were supplemented with 90 [micro]g/L acenocoumarol, 1000 [micro]g/L phenprocoumon, 1500 [micro]g/L warfarin, or 100 [micro]g/L IS.
3]/MeOH mixtures; the eluants
were combined into 31 fractions on the basis of TLC.
were dried under a stream of air at 56 [degrees]C.
18 gms) was chromatographed over silica gel using petroleum ethyl acetate mixtures of increasing polarity as eluants