期刊论文

中文

理化检验-化学分册

1001-4020

2002

38

5

229-230,233

10.3321/j.issn:1001-4020.2002.05.005

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）。；

本校为第一机构

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525nm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ε525=9.15×104L@mo1-1@cm-1,锌(Ⅱ)浓度在0～10μg/25ml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,结果满意.

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 ...