摘要
研究了 1 (2 羟基 3,5 二硝基苯基 ) 3 [4 (苯基偶氮 )苯基 ] 三氮烯 (HDNPAPT)与锌(Ⅱ )的显色条件。在乳化剂OP存在下的氢氧化钠介质中 ,在 5 2 5nm波长处 ,锌与HDNPAPT形成稳定的 1∶2的红色配合物 ,表观摩尔吸光系数ε52 5=9.15× 10 4 L·mol- 1·cm- 1,锌 (Ⅱ )浓度在 0～ 10 μg/ 2 5ml范围内符合比耳定律。方法已应用于人发、面粉中微量锌的测定 。
It was found that the new reagent, 1 (2 hydroxy 3,5 dinitrophenyl) 3 (4 phenylazophenyl) triazene (abbreviated as HDNPAPT) reacts with Zn(Ⅱ) ion to form a stable red complex in a NaOH medium of pH 11～12 and in the presence of OP. The mole ratio of Zn(Ⅱ) to HDNPAPT was found to be 1 to 2. The absorption maxima was found to lie at 525nm with an apparent molar absorptivity of 9.15×10 4L·mol -1 ·cm -1 . Beer′s law was obeyed in the range of 0～10μg of Zn(Ⅱ) per 25ml of solution. The method has been applied satisfactorily to the direct determination of zinc in hair and flour.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2002年第5期229-230,233,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
湖南省教育厅资助重点课题 (0 1A0 2 9)
湖南省自然科学基金资助课题 (0 1JJY2 0 78)。
