萃取光度法测定痕量氟的改进  

Improvements of Extraction-Spectrophotometric Method for the Determination of Trace Amount of Fluoride

作　　者：戴咏缨 王炜[1] 周天泽[1] 

机构地区：[1]首都师范大学化学系

出　　处：《分析化学》1993年第10期1202-1204,共3页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学研究基金

摘　　要：本文提出一种新的测定痕量氟的萃取光度法,系用N,N-二甲苯胺作萃取剂,证实异戊醇进入萃取的多元络合物组成,以六偏 酸钠和乙酰丙酮可消除多量铁、铝的干扰,生物样品则宜用过氧化氢及过氧化钠高压分解。本法可检测多种水样中10^(-9)级的氟,相对标准偏差<2％。A new extraction-spectrophotometric method for the determination of trace amount of fluoride is proposed, by using N, N-dimethylaniline as extractant, proving iso-pentyl alcohol into the composition of multi-dentate complex extracted,proposing a new masking system with sodium hexametaphosphate and acety-lacetone to elimi-nate the interference of macro amount of ferric and aluminium ions and using hydrogen pex-oxide and sodium peroxide to decompose bio-samples under high pressure. This method can detect fluoride ion in ppb level in various samples of water with relative standard deviation of less than 2%.

关 键 词：氟 萃取 光度法 茜素络合剂 

分 类 号：O613.41[理学—无机化学]