摘要：The ashing methods for the analysis of fluorine in plant materials were examined. It was found that the method using calcium oxide gives higher and more accurate recovery of fluorine than that using magnesium oxide. The ashing method with calcium oxide gave satisfying recovery from ashed plant leaves on a range of temperature 400°-700°, while the method with magnesium oxide gave maximum recovery of fluorine at about 600°. From these results, it was concluded that the ashing method with calcium oxide is routinely more excellent than that with magnesium oxide.
