Extraction of light filth from spirulina powders and tablets: collaborative study
Nakashima, M.J.; Angold, S.; Beavin, B.B.; Bradicich, R.B.; Decker, S.J.; Dzidowski, G.R.; Levesque, E.; Locatelli, R.G.; Mably, M.; Paredes, A.
Journal - Association of Official Analytical Chemists 72(3): 451-453
1989
ISSN/ISBN: 0004-5756 PMID: 2501292 Document Number: 333686
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.