【摘要】 本文探讨了铝与铬天青Ｓ的最佳显色反应条件。当ｐＨ为６．５，在溴化十六烷基三甲铵（ＣＴＭＡＢ）和乙醇的存在下，铝与铬天青Ｓ形成绿色配合物，最大吸收峰位于６３５ｕｍ，表观摩尔吸光系数为１．６５×１０５Ｌ／ｍｏｌ·ｃｍ，铝含量在０～０．２４μｇ／ｍＬ范围内符合比耳定律。在本实验条件下，该方法具有良好的选择性，应用于植物和土壤水中铝的测定，结果满意。更多还原

【Abstract】 The optimum condition of highly colour reaction of aluminium with chromazurol S has been studied. A green complex is formed as aluminium and chromazurol S in the presence of cetyltrimethylarnmonium bromide (CTMAB) and alcohol at pH 6. 4. The apparent molar absorptivity is 1. 65×10￣5 L/mol. cm at 635 nm. Beer’s law is obeyed for 0～0. 24 μg/mL of aluminium. In the presence of EDTA-Zn, the method has better selective. It has been applied to the determination of aluminium in plant and soil water with satisfactory results.更多还原