title: Removal of penicillin G from contaminated milk by ultrafiltration.
abstract: Penicillin G purposedly added to whole raw milk at concentrations from .05 to .20 IU/ml was removed to undetectable levels by a combination of ultrafiltrations and permeate washes. After penicillin removal, whole milk 3:1 vol/vol concentrated retentates were reconstituted to milk with antibiotic-free permeate with little change in composition and with very good to excellent flavor. Washing 3:1 vol/vol concentrated retentates from penicillin-contaminated milks with water also removed penicillin to an undetectable level but changed the composition of product, which displayed a flat flavor.
mesh_terms: D000818:Animals; D002417:Cattle; D005260:Female; D008892:Milk / Q000032:analysis*; D010400:Penicillin G / Q000302:isolation & purification*; D014462:Ultrafiltration
chemical_list: D010400:Penicillin G