摘要
目的对空气氟测定方法存在的几个问题进行探讨。方法用２层都经碳酸氢钠甘油溶液浸渍的超细玻纤滤纸采集空气氟，对ＴＩＳＡＢ的柠檬酸钠浓度进行选择，滤纸本底值、前处理方法、回收实验和方法现场应用进行研究。结果选用 １ｍｏｌ／Ｌ柠檬酸钠作ＴＩＳＢＡ测定偏差<５.２％；经浸渍处理的滤纸本底氟略有升高，但对气态或气溶胶态都能更好地阻留吸收；前处理方法可用政浸搅拌成纸浆浸放１ｈ代替４０℃超声１５ｍｉｎ；用煤飞灰标准物质加标回收，平均回收率９３．９％。结论该方法对空气氟阻留吸收率高，抗干扰能力强，电极响应较快，操作简单，结果准确可靠。
Objective Study on the problems of detecting air fluoride. Methods Two layers filter,which is steeped in NaCHO3-glycerine solution,are used to collecte fluoride in air. Select the concentration of DTA in TISAB,and research the basis value filter,procaprocedure of samples,recovery rate of method and the application of method. Results When select 1mol/L DTA in TISAB,the relative error of determination is smaller than 5.2%. Although the basis value is a little high,the filter is good absorbent of gaseity and aerosol fluoride. As for the pro-procedure,instead of dealing with supersonic for 15min in 40℃ stir in HCI for 1 hr. The average recovery of standard material (coal ash) is 93.9%. Conclusions The method can collect much fluoride in air. The method has good ability in anti-interference,quickly response,simple procedure and good accuracy.
出处
《中国地方病学杂志》
CAS
CSCD
2000年第2期148-149,共2页
Chinese Jouranl of Endemiology
