【摘要】 在ｐＨ为６．５的ＨＡｃ－ＮａＡｃ介质中，ＣＰＢ存在且经６０～７０℃加热，Ａｌ￣３＋与二溴羟基苯基荧光酮（ＤＢＨ－ＰＦ）４ｍｉｎ即完成显色反应，形成１：２紫红色络合物，吸光度至少稳定２４ｈ，最大吸收峰位于５６８ｎｍ处，摩尔吸光系数为１．１８×１０￣５，Ａｌ量在０～０．２μｇ／ｍｌ范围内符合比不定律。方法已应用于岩矿中微量Ａｌ的直接测定，其结果与标准值吻合较好，ＲＳＤ（ｎ＝５）均＜３％。更多还原

【Abstract】 In the presence of surfactant CPB and in HAc-NaAc medium(pH 6.5),aluminium reacts with DBH-PF at 60～70℃ to form a 1:2 purple micelle complex in 4min. The color is stable forat least 24h,the maximum absorption is at 5 68nm,the molar absorptivity being 1.18×10￣5.Beer’s law is obeyed up to 5.0μg of Al in 25ml. The method has been used for the determinationof trace amounts of aluminium in rock and mineral samples. The results agrees with therecommended values, with RSD<3%(n=5).更多还原