Which preposition to use with admixtures

of Occurrences 191%

On examining these microscopically, Professor Bailey found, as Ehrenberg had done in the case of mud obtained on the opposite side of the Arctic region, that the fine mud was made up of shells of Diatomacoe, of spicula of sponges, and of Radiolaria, with a small admixture of mineral matters, but without a trace of any calcareous organisms.

with Occurrences 6%

All these circumstances concerning the first voyage are derived from John Cabot's own reports, and are extracted from documents dated previous to the return of the second expedition, and therefore are, of necessity, free from admixture with extraneous incidents.

from Occurrences 1%

PUSHTOO or PUSHTO, the language of the Afghans, said to be derived from the Zend, with admixtures from the neighbouring tribes.

to Occurrences 1%

Admixtures to the stock took place during the 11th century through the Danish and Norman conquests.

Which preposition to use with  admixtures