Abstract:

High-performance liq. chromatog. was used to sep. and identify oleate and 9,10-dibromostearate esters of polyethylene glycols having various d.p. A Lichrosorb SI-60 (10 $μ$m) column was used with gradient elution (using a mixt. of iso-PrOH, MeOH, and hexane at 50°) and UV detection at 220 nm for the best sepn. of ethoxylates having d.p. ≤20. No derivatization of the ethoxylates was required. An improved baseline was obtained by adding negligible amts. of anthracene to the eluent. [on SciFinder(R)]