一类萤光酮试剂的析相体系研究5──二溴苯基萤光酮析相光度法测定微量铝  

Phase Separation Spectrophotomtric Determination of Trace Al with Al-DBPF-TritonX-100

作　　者：曾锋[1,2] 崔昆燕[1,2] 张敏燕 

机构地区：[1]华东地质学院应用化学系 [2]广州五山中科院广州地球化学研究所有机地球化学国家重点试验室

出　　处：《广东工业大学学报》1997年第S1期54-55,61,共3页Journal of Guangdong University of Technology

基　　金：江西省青年科学基金

摘　　要：研究了铝－二溴苯基萤光酮－ＴｒｉｔｏｎＸ－１００析相显色体系，建立了测定茶叶中微量铝的析相光度法。在ｐＨ５．０的六次甲基四胺－盐酸缓冲介质中，铝－二溴苯基萤光酮－ＴｒｉｔｏｎＸ－１００胶束溶液在９５℃加热１ｈ，配合物即被ＴｒｉｔｏｎＸ１００相完全富集。最大吸收峰为５６４ｎｍ，铝含量０～９μ／５ｍＬ服从比耳定律，方法，应用于茶叶微量铝的测定，结果满意。The optimum condition of the phase separation colour reaction of Al-dibromophenylfluorone (DBPF) with TritonX-100 has been studied and a method for the determination of trace Al in tea has proposed.In pH5 0(CH 2) 6N 4-HCl buffer mediumn,the complex can be collected in TritonX100 phase when heating at 95℃ for 1h in a boiling water bath.The apparent motar absorptivity of the complex is 5 2×10 4L·mol -1 ·cm -1 at 564nm.Beet’s law is obeyed in the range of 0 to 9μg/5mL.the proposed method has been applied to determination of trace amounts of Al in teas with satistactory results.

关 键 词：铝 二溴苯基萤光酮 析相光度法 茶叶 

分 类 号：O657.32[理学—分析化学]