Determination of Fluoride in Antarctic Krill (Euphausia superba) Using Ion Chromatography and its Pretreatments Selection
文献类型： 外文期刊
作者： Zhao, Yan-Ling 1 ; Zhu, Lan-Lan 1 ; Sun, Yong 1 ; Zhou, De-Qing 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Dept Food Engn & Nutr, Qingdao, Shandong, Peoples R China
2.Shanghai Ocean Univ, Coll Food Sci & Technol, Shanghai, Peoples R China
关键词： fluoride in krill;fluoride quantification;extraction methods;preparations
期刊名称：CZECH JOURNAL OF FOOD SCIENCES （ 影响因子：1.279； 五年影响因子：1.829 ）
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年卷期：
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收录情况： SCI
摘要： A rapid, sensitive and reliable method to quantify fluoride in Antarctic krill has been established. Four different pretreatment methods were used for the extraction of fluoride: double-deionised water extraction, sulphuric acid distillation, hydrochloric acid extraction, and pH adjustment with buffer after hydrochloric acid extraction. Four methods of comparative analysis revealed that sulphuric acid distillation was suitable preparation for ion chromatography determination of fluoride in Antarctic krill (fluoride content 288.7 +/- 10.2 mg/kg). The method was partially validated in linearity, accuracy, and precision. The linear range was from 0.1 to 10.0 mg/l with the regression coefficient of 0.99998. The accuracy expressed as the recoveries of standard addition ranged from 95.3% to 101.3%, the relative standard deviation (n = 8) was 1.8-1.9%. With this method, the 3 sigma limit of detection was 0.06 mg/l of fluoride in Antarctic krill. Our results indicate that the method (limit of quantification 0.2 mg/l) could be well applied for the determination of fluoride in Antarctic krill.
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