Determination of fluorine in the environmental samples by combustion-hydrolysis-ion selective electrode method
Feng, F.; Liu, X.; Yu, J.; Wang, W.
Wei Sheng Yan Jiu 33(3): 288-291
2004
ISSN/ISBN: 1000-8020 PMID: 15211794 Document Number: 575007
To establish a fast and accurately method of determination of fluorine in coal, hair and food by combustion-hydrolysis-ion selective electrode method. The influence factors on combustion-hydrolysis, such as silica weight, temperature and time of hydrolysis, sample weight and volume of distilled water were studied so that to determine the best of all testing conditions. The time for hydrolysis in this method was reduced by one third of that of GB/T4633-1997 standard of PRC method. The fluorine in standard reference material such as tea, poplar leaves, coal and capsicum, and corn was determined on precision and accuracy by this method. The relative standard deviation was less than 5%. The recovery varied from 90.3% to 107.6%. The method is suitable for determining fluorine in the various environmental samples.