【摘要】 本文研究了铝－５＇－硝基水杨基荧光酮（５＇－ＮＳＦ）－溴化十六烷基吡啶（ＣＰＢ）体系的显色条件。试验结果表明，在ｐＨ４．５～６．０范围内，铝与５＇－ＮＳＦ及ＣＰＢ形成紫红色的三元配合物，其最大吸收波长为５５８ｎｍ，摩尔吸光系数为１．３×１０￣５，配合物的组成为Ａｌ：５＇－ＮＳＦ：ＣＰＢ＝１：２：２。铝浓度在０～４μｇ／２５ｍＬ范围内符合比耳定律。方法用于石灰石、石英沙、石膏中铝的测定，结果令人满意。更多还原

【Abstract】 A ternary complex of aluminium(Ⅲ)with 5’- nitrosalicylfluorone(5’-NSF)andcetylpyridinium bromide(CPB)is formed atpH 4.5～6.0. Its maximum absorption is at558nm,and the molar absorptivity is1.3×10￣5L·mol￣(-1)·cm￣(-1). Beer’ s law is obeyedfor 0～4μgAl/25mL。The molar ratio of Al(Ⅲ):5’-NSF:CPB is 1:2:2.The influ-ence of foreign ions and their eliminationhave alsobeen studied.The method hasbeen applied to the determination of alumini-um in limestone,quartz,sand and gypsum-with satisfactory results.更多还原