【摘要】 以含水量80%的油/水型十二烷基硫酸钠/正丁醇/正庚烷/水微乳液为介质,以5-Br-PADAP 为显色剂,进行了 Zn(Ⅱ)的分光光度测定。表观摩尔吸光系数达1.22×10~5,与相应的胶束体系(ε=6.4×10~4)比较,测定灵敏度提高近一倍,方法用于实际样品分析,结果满意。更多还原

【Abstract】 The sensitized reaction of O/W anionicmicroemulsion SDS-n-C₄H₉OH-n-C₇H₁₆-H2O as medium on the zinc with 2-（5-bromo-2-pyridylazo）-5-dethylaminophenol complexes was studied at 10—30℃.The results show that the maximum absorption wavelength was at 560nm and the sensitivity in SDS-n-C₄H₉OH-n-C₇H₁₆-H₂O O/W microemulsion medium was the highest compared with that in SDS micelle medium.The molar absorption coefficient was 1.22 ×10⁵L·mol^-1·cm^-1.Beer’s law was obeyed in the concentration range of 0—1μg/10ml.The method has been used for the rapid determination of trace Zn（Ⅱ）in aluminum alloy and huaman hair更多还原