Chem. J. Chinese Universities ›› 1988, Vol. 9 ›› Issue (6): 627.

• Articles • Previous Articles     Next Articles

Determination of Trace Amount of Fluoride by Gas Chromatography

Ma Mings heng, Chen Weijie   

  1. Chemistry Department of Beijing Normal University, Beijing
  • Received:1986-11-28 Online:1988-06-24 Published:1988-06-24

Abstract: A new method for the determination of fluoride ions is proposed. Under acidic condition, trimethylfluorosilane was produced from hexamethyl disilazane and hydrofluoride, and then separated by gas chromatography using a 15% OV-3 column at 100℃. The detective limit is 5 ng/g. Aluminum ion or silicate ion have no interference with the determination even its content is as high as 2000:1 or 400:1 respectively to the fluoride ion.

Key words: Hexamethyl disilazane, Fluoride, Trimethlyfluorosilane, Gas chromatograph

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