用氧瓶燃烧法分解样品,随后用基于F~-使锆和埃罗菁R生成的颜色络合物退色的反应,进行比色法测定.测定消光的波长为620mμ.样品量范围,当含F0～5%时为1.0～1.5mg,当含F5～20%时为0.5～1.0mg. The sample was decomposed by an oxygen bottle combustion method and then subjected to a colorimetric determination by a reaction based on the F ~ -fading of the color complex formed by zirconium and eromelanine R. The extinction wavelength was determined to be 620 mμ. 1.0 to 1.5 mg for F0 to 5% and 0.5 to 1.0 mg for F5 to 20%.