FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (2): 350-352.

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Determination of Inorganic Fluoride in Brick Tea by Ion Chromatography Conductivity Detector

 ZHANG  Shu-Fen, SHI  Ping-Ping, FU  Xiao, SHEN  Jian   

  1. Ningbo Supervision and Inspection Institute of Product Quality, Ningbo 315041, China
  • Online:2008-02-15 Published:2011-08-24

Abstract: A simple and rapid method for determination of F-in brick tea by ion chromatography with conductivity detector was studied. The anions were tested on AS18(4 mm×250 mm) anion exchange column using multi-step gradient KOH as eluent. The flow rate of mobile phase was 1.0 ml/min. The correction coefficients were 0.9998 detection limits (3S/N) were found to be 0.01 mg/kg. Recoveries tested by the different lever addition were in the range of 95.0%~106.0%.

Key words: ion chromatography, brick tea, fluoride