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Organic Acid Extraction of Fluoride from Antarctic Krill Euphausia superba

机译：南极磷虾紫杉的有机酸萃取

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The amount of fluoride removed from Antarctic krill via organic acid extraction depends on the extraction time, concentration, extraction volume, and the nature of the acid itself. The fluoride content in Euphausia superba was determined by measuring the concentration of fluoride ion in acidic extracts using an ion-selective electrode. The best results were obtained by adding 50 mL of 0.01 M citric acid to 0.3-0.5 g of krill and extracting for 5 min. Under these conditions, recoveries of fluoride from frozen whole krill and krill meat were 95.6-99.5% and 97.5-101.3%, respectively. The dry basis fluoride contents of krill by-product, krill meat and the boiled krill were 705, 298, and 575 ppm, respectively. These levels were significantly reduced by citric acid extraction.
机译：通过有机酸萃取从南极磷虾中除去的氟化物的量取决于萃取时间，浓度，萃取量以及酸本身的性质。通过使用离子选择电极测量酸性提取物中的氟离子浓度，可以确定南极磷虾中的氟含量。将50 mL的0.01 M柠檬酸加入0.3-0.5 g的磷虾中，萃取5分钟，可获得最佳结果。在这些条件下，冷冻全磷虾和磷虾肉中氟的回收率分别为95.6-99.5％和97.5-101.3％。磷虾副产品，磷虾肉和水煮磷虾的干基氟化物含量分别为705、298和575 ppm。柠檬酸提取显着降低了这些水平。

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