一类萤光酮试剂的析相体系研究4──邻氯苯基萤光酮析相光度法测定矿石中痕量镓  

Study of the Phase Separation System on a Series of FluoroneReagent 4: The Phase Separation SpectropholometricDetermination of Trace Gallium by o-Chlorohenylfluorone

作　　者：崔昆燕[1,2] 曾锋[1,2] 

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实验室

出　　处：《广东工业大学学报》1997年第S1期51-53,共3页Journal of Guangdong University of Technology

基　　金：江西省青年科学基金

摘　　要：研究了镓－邻氯苯基萤光酮－ＴｒｉｔｏｎＸ－１００析相显色体系，建立了测定镓的析相光度法。在ｐＨ７．０磷酸二氢钾－磷酸氢二钠缓冲介质中，镓－邻氯苯基萤光酮－ＴｒｉｔｏｎＸ－１００胶束溶液在９５℃加热１ｈ，配合物即被ＴｒｉｔｏｎＸ－１００相完全富集．最大吸收峰为５７５ｎｍ，表观摩尔吸光系数为１．０５×１０５Ｌ·ｍｏＬ－１·ｃｍ－１，镓含量０～８μｇ／５ｍＬ服从比耳定律，采用Ｐ３５０萃取树脂分离，应用于矿石中微量镓测定，结果满意。The optimum condition of the phase separation colour reaction of gallium with o-chlorophenylfluorone(o-Cl·PF) and TritonX-100 has been studied.A method for the determination of trace Ga in ores has proposed.In pH7.0 KH 2PO 4-Na 2HPO 4 buffer mediumn,the complex can be collected in TritonX-100 phase when heating at 95℃ for 1h in a boiling water bath.The apparent molar absorptivity of the complex is 1.05×10 5 mol·L -1 ·cm -1 at 575nm.Beer′s law is obeyed in the range of 0 to 8μg/5mL.The proposed method has been appied to deltermination of trace amounts of Ga in ores ofter separation by P 350 resin with satisfactory results.

关 键 词：镓 邻氯苯基萤光酮 析相光度法 矿石 

分 类 号：O657.32[理学—分析化学]