摘要
在CTMAB存在下 ,镓与苯基荧光酮在 pH6 0的乙酸 -乙酸钠缓冲溶液中生成蓝色络合物 ,其表观摩尔吸光系数为1 3 1× 10 5,最大吸收波长为 5 63nm ,络合物组成比为镓∶苯基荧光酮 =1∶4。于 2 5mL溶液中 ,镓质量在 0～ 8μg范围内遵守比尔定律。采用乙酸丁酯萃取分离干扰元素 ,此法测定煤矸石中微量镓 。
In a buffer solution of acetic acid-sodium acetate(pH6 0),the gallium*# reacts with phenylfluorone(PF) to form a blue complex in the presence of hexadecytrimethylammonium bromide(CTMAB) The complex exhibits maximum absorption at 563nm with a apparent molar absorptivity of 1 31×10 5L·mol -1 ·cm -1 The molar ratio of gallium to phenylfluorone in the complex is 1∶4 Beer's law is obeyed in the range from 0-8μg/25mL for gallium The interference of foreign ions can be eliminated by solvent extraction with n-butyl acetate The method has been applied to the determination of micro amounts of gallium in coal gangue with satisfactory results
出处
《冶金分析》
CAS
CSCD
北大核心
2003年第6期39-40,38,共3页
Metallurgical Analysis
关键词
煤矸石
镓
测定
苯基荧光酮
光度法
gallium
phenylfluorone
coal gangue
spectrophotometry
