Isolation of light filth from ground oregano and ground marjoram: a modification using isopropanol as a defatting agent: in-house study.
A procedural modification of the AOAC Official Method for extracting light filth from ground oregano and ground marjoram was tested in an intralaboratory study. The modified method specifies isopropanol defatting, 975.49A(a), rather than chloroform-isopropanol defatting, 975.49A(b), followed by direct flotation as directed in AOAC Official Method, 975.49B(b). The modified method provided comparable results in less time while also providing safety, health, and financial benefits.
Wheeler
Mark
M
US Department of Agriculture, Food Safety and Inspection Service, OPPDE, Washington, DC 20205, USA. mark.wheeler@usda.gov
Bennett
Barbara
B
Marks
Harry
H
D003212:Condiments / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D006197:Hair; D031341:Origanum