中文摘要：

研究了在简单的丙醇-氯化钠双水相体系中4-（2-吡啶偶氮）-间苯二酚（PAR）与Zn^2＋形成的配合物的分配行为,建立了分离和测定工业废水中Zn^2＋的双水相萃取光度分析方法。结果表明,在pH=8.0的Na2B4O7-HCl缓冲溶液中,PAR与Zn^2＋形成的配合物被萃取到丙醇中,其最大吸收波长为493nm,与PAR和丙醇水溶液的混合液相比,发生了88nm的红移。在该条件下,Zn2＋在0.05～0.25μg·mL-1范围内符合比尔定律,其相关系数为0.9989,表观摩尔吸光系数ε为2.26×10^4 L·mol^-1·cm^-1。该方法测定工业废水中的Zn2＋与原子吸收法结果一致。

英文摘要：

The distribution behavior was studied between PAR（4-（2-Pyridylazo）resorcinol） and Zn^2＋ complex in a simple aqueous two-phase system of n-Propyl alcohol/sodium chloride（NaCl）, and an aqueous two-phase extraction photometric analysis method for separating and determining Zn^2＋in industrial waste water was established. The results showed that the complex of PAR and Zn^2＋ was extracted into the n-Propyl alcohol phase at pH=8.0 of Na2B4O7-HCl buffer solution. The maximum absorption wavelength of the extracted complex in the n-Propyl alcohol phase was located at 493 nm. There was a red shift of 88 nm compared with the mixture solution of PAR and n-Propyl alcohol aqueous solution. Under this condition, Beer＇s law was obeyed for the amount of Zn^2＋ in the range of 0. 05-0.25 μg·mL^-1, and the linear correlation coefficient was 0. 9989 and the apparent molar absorptivity （ε） is 2.26 ×10^4 L·mol^-1· cm^-1. The ana measure lyti db advantages cal results obtained for Zn^2＋ in industrial waste water were in good agreement with values y atomic absorption spectrometry, and the extraction process of this method have more compared with traditional methods toward environmental safety.