氟碳铈矿测氟样品处理新方法研究  

Study on determination of fluorine in hamartite

作　　者：马玉洁[1] 马骏[1] 柴岚岚[1] 万芳[1] 蔡莉[1] 赵仕林[1] 

机构地区：[1]四川师范大学化学学院,成都610066

出　　处：《分析试验室》2006年第6期28-31,共4页Chinese Journal of Analysis Laboratory

基　　金：四川省重点攻关项目资助

摘　　要：用国标GB7483-87《水质氟化物的测定氟试剂分光光度法》不能准确测定氟碳铈矿中的氟量.原因在于该氟碳铈矿中的氟量比较高,一般达到9%～11%,易形成REF3沉淀,用一般的酸消解法很难将氟从矿样中全部蒸馏出来.本文采用加入Ca（OH）2,使氟转化CaF2,矿中的氟能完全被蒸出.并做了矿中氟测定的精密度实验,矿中的氟质量分数为9.02%,CV=0.4424.经加标矿中氟量的0.5、1和2倍等3个水平,其回收率在97.83%～99.44%范围,方法是对国标测氟法的重要补充.The amount of fluorine in hamartite could not determine accurately by using GB7483 - 87 《Determination of fluorine in water by spectrophotometry with fluorinating agentl》. The reason was that the content of fluorine in Sichuan hamartite was much higher, and generally up to 7 % - 11%. It was easy to form REF3 sediments. It was very difficult to steam out all of the fluorine in hamartite by using acid digestion. In this work, F was transformed into CaF2 with the addition of Ca（ OH）2, and the fluorine in the mines could be steamed out completely. The amount of the fluorine in the mines was 9.02 %, and CV was 0.44. Recoveries were 97.83 % ～ 99.44 % by adding standard with 0.5, 1 and 2 times of the fluorine in the mines. This method has high precision, good accuracy and reliability, and it is simple and rapid. So it is a significant supplement to the fluorine measurement of the GB.

关 键 词：氟碳铈矿 氟 Ca(OH)2法 测定 

分 类 号：O652.4[理学—分析化学]