Abstract
A simple and rapid analytical procedure was investigated for determination of iflouride in Antarctic Krill Euphursia superba. An ionselective electrode method was adopted to simplify and make rapid the procedure. The fluoride content in krill was obtained by measuring the concentration of fluoride of the extrabled solution with an ion meter. For extraction of fluoride, 0.05 N HCLO4 solution was the most suitable. The most satisfactory results were obtained by using 100 ml of acid and shaking for 45-60 minutes on 1-2g of sample. The presence of cations, anions, and protein of ordinary cotents did not interfere. Recoveries of fluoride on eighteen samples were 90-100% and coefficient of variation was 3.34%. Fluoride contents in krill were 470-510 ppm and C. V. was 2.12% by this proposed method.
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