title: Extraction of light filth from spirulina powders and tablets: collaborative study.
abstract: Results are reported for a collaborative study of a method for the extraction of light filth from spirulina (a blue-green alga) powder and tablets. A 50 g portion of either powder or tablets is dispersed in water, and then boiled with dilute HCI solution. Hairs and insect fragments are isolated by wet sieving on a No. 230 sieve, flotation with mineral oil, and washings of the mineral oil in a percolator. Average recoveries by 12 collaborators for tablets and powders were 70.6 and 70.2%, respectively, for 10 rat hair spikes and 68.3 and 84.4%, respectively, for 20 insect fragment spikes. The method has been approved interim official first action.
authors.affiliation: Food and Drug Administration, Division of Microbiology, Washington, DC 20204.
authors.forename: M J
authors.initials: MJ
authors.lastname: Nakashima
authors.forename: S
authors.initials: S
authors.lastname: Angold
authors.forename: B B
authors.initials: BB
authors.lastname: Beavin
authors.forename: R B
authors.initials: RB
authors.lastname: Bradicich
authors.forename: S J
authors.initials: SJ
authors.lastname: Decker
authors.forename: G R
authors.initials: GR
authors.lastname: Dzidowski
authors.forename: E
authors.initials: E
authors.lastname: Levesque
authors.forename: R G
authors.initials: RG
authors.lastname: Locatelli
authors.forename: M
authors.initials: M
authors.lastname: Mably
authors.forename: A
authors.initials: A
authors.lastname: Paredes
mesh_terms: D000458:Cyanobacteria / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D011208:Powders / Q000032:analysis; D013607:Tablets / Q000032:analysis
chemical_list: D011208:Powders; D013607:Tablets