Extraction of light filth from spirulina powders and tablets: collaborative study.
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.
Nakashima
M J
MJ
Food and Drug Administration, Division of Microbiology, Washington, DC 20204.
Angold
S
S
Beavin
B B
BB
Bradicich
R B
RB
Decker
S J
SJ
Dzidowski
G R
GR
Levesque
E
E
Locatelli
R G
RG
Mably
M
M
Paredes
A
A
D000458:Cyanobacteria / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D011208:Powders / Q000032:analysis; D013607:Tablets / Q000032:analysis
D011208:Powders; D013607:Tablets