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1963 Jrnl. Amer. Chem. Soc. 85 632/2 The entire mixture was preseparated on an alumina column.]

1967 E. Chambers Photolitho-offset iii. 30 Pre-separated colour art work can be prepared using Bourges Colotone overlays.

1992 Science 6 Nov. 1053/1 Carbon can be separated from fossil fuels by separating CO₂ from products of combustion in air or in pre-separated oxygen.