サリチルフルオロン，ジルコニウム（Ⅳ），フッ化物イオン間の呈色反応を用いるジルコニウム（Ⅳ）及びフツ化物イオンの吸光光度定量

摘要

A novel spectrophotometric method was established for the determination of zirconium (Ⅳ) and fluoride ion. The method was based on complex formation among salicylfluorone (SAF), Zr(Ⅳ) and fluoride ion in the presence of a cationic surfactant. In the determination of Zr(Ⅳ), Beer's law was obeyed in the range of 0.09 ～ 0.46 μg cm~(-3) in a neutral medium. The effective molar absorptivity at 550 nm and the relative standard deviation were 1.7 × 10~5 dm~3 mol~(-1) cm~(-1) and 0.32% (n = 6), respectively. In the determination of fluoride ion, Beer's law was obeyed in the range of 3.8 ～ 65 ng cm~(-3) in a strong acidic medium. The effective molar absorptivity at 552 nm and the relative standard deviation were 2.1 × 10~5 dm~3 mol~(-1) cm~(-1) and 1.3% (n — 6), respectively.%陽イオン性界面活性剤のTSAC共存下，SAF，Zr（IV），及びF~-の問で生成する四元型混合錯体を用いるZr（Ⅳ），F~-の簡便で高感度な新規吸光光度法の開発を行った．今後，詳細な錯体の組成，本法の応用面等において精査することが必要である．