CAJ | 학술논문

本文采用溶胶-凝胶方法合成SiO_2溶胶,制备了8-羟基喹啉改性的有序介孔SiO_2涂层毛细管,建立了毛细管微萃取-电感耦合等离子体质谱(CME-ICP-MS)在线联用技术分析铝形态的新方法.选择游离态铝和Al-柠檬酸络合物为不同铝形态的代表物,详细探讨了不同实验参数对铝形态分离的影响.结果表明:8-羟基喹啉改性的有序介孔SiO_2涂层毛细管在pH为5.0～8.0的范围内可以有效地分离试样中的稳定态单核铝(柠檬酸铝)和非稳定态无机单核铝(游离态铝).方法的富集倍数为10,检出限为0.34 ng·mL~(-1).该法应用于湖水、池塘水和长江水中铝的组形态分析,所得结果与8-羟基喹啉负载硅胶微柱分离所得结果吻合很好.
본문채용용효-응효방법합성SiO_2용효,제비료8-간기규람개성적유서개공SiO_2도층모세관,건립료모세관미췌취-전감우합등리자체질보(CME-ICP-MS)재선련용기술분석려형태적신방법.선택유리태려화Al-저몽산락합물위불동려형태적대표물,상세탐토료불동실험삼수대려형태분리적영향.결과표명:8-간기규람개성적유서개공SiO_2도층모세관재pH위5.0～8.0적범위내가이유효지분리시양중적은정태단핵려(저몽산려)화비은정태무궤단핵려(유리태려).방법적부집배수위10,검출한위0.34 ng·mL~(-1).해법응용우호수、지당수화장강수중려적조형태분석,소득결과여8-간기규람부재규효미주분리소득결과문합흔호.
An ordered mesoporous silica coated capillary prepared by sol-gel technique was dynamically modified with 8-hydroxyquinoline (8-Ox) for the fractionation of aluminum by capillary microextraction (CME). It was found that non-labile nomomeric Al (Al-citrate) and labile nomomeric (free Al) could be efficiently separated by 8-Ox modified ordered mesoporous silica coated capillary at the pH range of 5.0-8.0. Based on this fact, a new technique of CME on-line coupled with ICP-MS has been proposed for the analysis of different Al species in environmental waters. Under the optimal conditions, the detection limit for Al was 0.34 ng·mL~(-1) and the preconcentration factor was 10 fold. The method has been applied to the fractionation of Al in lake water, pool water and Yangtze River water, and the results were in good agreement with that obtained by the 8-Ox loaded silylanization silica gel microcolumn system.