Abstract
[Objective] To improve the detection result accuracy of the fluoride content of brick tea. [Methods] Brick tea is taken as the research object to evaluate the uncertainty of the fluorine content of brick tea by the fluoride ion-selective electrode method according to GB 19965—2005 "Fluorine content of brick tea", CNAS-GL006 "Guide on Quantifying Uncertainty in Chemical Analysis", and JJF 10591—2012 "Evaluation and Expression of Uncertainty in Measurement". [Results] Under the 95% confidence interval, the fluoride content in brick tea is (281±17) mg/kg, k=2. [Conclusion] In fluorine content determination by the fluoride ion-selective electrode method, the primary source of uncertainty is the use of the pipette during standard curve configuration.
Publication Date
10-28-2025
First Page
52
Last Page
57
DOI
10.13652/j.spjx.1003.5788.2024.81197
Recommended Citation
Xin, TAN; Jing, TANG; Zhongying, LIU; and Ping, HUA
(2025)
"Uncertainty evaluation for fluoride content determination in brick tea by fluoride-ion selective electrode method,"
Food and Machinery: Vol. 41:
Iss.
9, Article 7.
DOI: 10.13652/j.spjx.1003.5788.2024.81197
Available at:
https://www.ifoodmm.cn/journal/vol41/iss9/7
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