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Simple Method for Extracting Fat From Whole Milk Powder

Eastern Utilization Research and Development Division U. S. Department of Agriculture Washington 25, D. C.

ABSTRACT

In connection with a study of off-flavor constituents in foam-dried whole milk powder, a simple, rapid method has been developed which quantitatively extracts the fat from both foam- and spray-dried powders. Previous work in this regard has been recorded by Lampitt and Bushill (2) and Whitney and Tracy (3). However, both of these methods were deemed unsuitable for our purpose, mainly because of the relatively long procedural times involved.

EXPERIMENTAL PROCEDURE

Fifty milliliters of methanol (Baker's¹ ACS grade) and 20 g. of powder were mixed with a glass rod until fluid enough (about 5 min.) to be stirred magnetically (15 min.). The methanol extract was filtered from the powder through S & S 507 paper using light suction. The dry powder was returned to the beaker and stirred with 100 ml. n-hexane (Phillips,¹ high grade) for 15 min. The slurry was filtered as above and the hexane extraction repeated once more.