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Determination of fluoride in Antarctic krill (Euphausia superba) using ion chromatography and its pretreatments selection

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  • Yan-Ling ZHAO

    (Department of Food Engineering and Nutrition, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, Shandong Province, P.R. China
    College of Food Science and Technology, Shanghai Ocean University, Shanghai, P.R. China)

  • Lan-Lan ZHU

    (Department of Food Engineering and Nutrition, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, Shandong Province, P.R. China)

  • Yong SUN

    (Department of Food Engineering and Nutrition, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, Shandong Province, P.R. China)

  • De-Qing ZHOU

    (Department of Food Engineering and Nutrition, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, Shandong Province, P.R. China)

Abstract

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 3σ 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.

Suggested Citation

  • Yan-Ling ZHAO & Lan-Lan ZHU & Yong SUN & De-Qing ZHOU, 2015. "Determination of fluoride in Antarctic krill (Euphausia superba) using ion chromatography and its pretreatments selection," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 33(1), pages 77-82.
    • Handle: RePEc:caa:jnlcjf:v:33:y:2015:i:1:id:498-2013-cjfs
    DOI: 10.17221/498/2013-CJFS
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