【摘要】 合成了新型荧光探针单(6-对氨基苯甲酸-6-脱氧)-β-环糊精(ACD)。探讨了与Cr2O27-的识别反应。在pH4·90的NaAc-HAc缓冲溶液中,Cr2O72-能使ACD的荧光猝灭,据此建立了测定Cr(Ⅵ)的新方法,在最优化实验条件下,线性范围为5·20~1040μg·L-1,检出限1·26μg·L-1。22种常见离子干扰实验结果表明该试剂对Cr2O72-有较高的选择性识别效果。此法用于电镀液、电镀废液中痕量Cr(Ⅵ)的测定,结果令人满意。更多还原

【Abstract】 A novel fluorescence probe, mono[6-o-（4-aminobenzoic acid）]-β-cyclodextrin（ACD）, was synthesized, and a new sensitive fluorescence identification reaction was studied based on the reaction of Cr₂O^2-₇ with compound ACD in NaAc-HAc buffer medium at pH 4.90. Under optimal conditions the determination limit was 1.26 μg· L^-1. The linear range was 5.20-1 040 μg· L^-1. This method has been applied to the determination of trace amounts of chromium （Ⅵ）in electroplating liquor, electroplating waste water with satisfactory results.更多还原