(中南大學(xué) 化學(xué)化工學(xué)院， 長沙 410083)
摘 要: 采用流動注射微量滴定分析方法，通過鋁酸鈉溶液分析儀，研究了以磺基水楊酸(SAL)為滴定劑、 NaF為絡(luò)合劑及酚酞為指示劑時，自動分析鋁酸鈉溶液中氧化鋁含量的方法。探討了滴定劑濃度、采樣體積、管道內(nèi)徑及長度、共存元素的影響，推測了NaF與SAL-Al(OH)3的絡(luò)合比例。
關(guān)鍵字: 流動注射微量滴定； 鋁酸鈉； 氧化鋁； 自動分析
sodium aluminate solutions by
micro-flow injection titration
（College of Chemistry and Chemical Engineering,
Central South University, Changsha 410083, P.R.China）
Abstract: Automatic determination of alumina in sodium aluminate solutions was realized by micro-flow injection titration. Sodium fluoride was used as complexing agent for alumina and releasing the corresponding hydroxide ion to alumina, phenolphthalein was used as the corresponding indicator for the determination of the corresponding hydroxide ion to alumina, sulfosalicylic acid was the titrant for the corresponding hydroxide ion to alumina, caustic hydroxide, and 1/2 sodium carbonate.
Key words: micro-flow injection titration; aluminate; alumina; automatic analysis
