分光光度法测定铬黑T解离常数实验设计

孙瑞卿, 许紫婷, 陈珠灵, 林佳丽

Experimental Design on the Determination of Dissociation Constants of Eriochrome Black T by Spectrophotometry

Ruiqing Sun, Ziting Xu, Zhuling Chen, Jiali Lin

表3 516 nm处铬黑T溶液吸光度及计算

样品编号 pH A(λ516 nm) $ \lg \left( {\frac{{{A_0} - {A_1}}}{{{A_1} - {A_2}}}} \right) $ 样品编号 pH A(λ516 nm) $ \lg \left( {\frac{{{A_0} - {A_1}}}{{{A_1} - {A_2}}}} \right) $ 1 2.09 0.276 9 4.98 0.288 2 2.82 0.276 10 5.54 0.289 ?1.890 3 3.18 0.277 ?1.040 11 5.75 0.291 ?1.400 4 3.55 0.28 ?0.300 12 5.98 0.303 ?0.630 5 3.90 0.282 0 13 6.25 0.316 ?0.260 6 4.22 0.285 0.477 14 6.74 0.354 0.706 7 4.50 0.287 1.041 15 7.02 0.365 1.585 8 4.77 0.288 16 7.85 0.367