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为使氟中毒防治研究工作的分析数据具有可靠性和可比性,我们对各种测定氟化物的方法进行比较后认为,燃烧水解法预处理样品,氟电极法测定玉米样品中的全氟是一种较理想的方法。燃烧水解法是在氧气和水蒸汽流中进行的特殊分解法,样品中的氟被转化成氟化氢或其他挥发性氟化物。用本法测定英国甘蓝标样,测定值为5.77μg/g,标样标准值为5.87±0.97μg/g;样品加CaF_2和NaF的回收率分別为90.4～102.5％和96.4～105.4％,方法准确可靠。
In order to make fluorocarbon poisoning prevention and control work of the analysis of data reliability and comparability, we have a variety of methods for the determination of fluoride comparison that the pretreatment of combustion hydrolysis samples, fluoride electrode method for the determination of perfluorinated corn samples is a A better way. Burning hydrolysis is a special decomposition process in oxygen and water vapor streams where the fluorine in the sample is converted to hydrogen fluoride or other volatile fluorides. The method was applied to the determination of the standard sample of B. korshinskii in the United Kingdom, with the measured value of 5.77μg / g and the standard value of 5.87 ± 0.97μg / g. The recoveries of CaF_2 and NaF were 90.4-102.5% and 96.4-104.4% respectively. Accurate and reliable