用偶氮氯膦I分光光度法测定铝

Spectrophotometric determination of aluminium with chlorophosphonazo I.

作者信息

Ying-Quan Z, Lin Z, Jun-Yi L

机构信息

Department of Chemistry, Huazhong Normal College, Wuchang Gui-zi Shan, Wuhan, China.

出版信息

Talanta. 1983 Apr;30(4):291-3. doi: 10.1016/0039-9140(83)80068-x.

DOI:10.1016/0039-9140(83)80068-x

PMID:18963363

Abstract

Aluminium reacts with Chlorophosphonazo I at pH 4-6 to form a water-soluble 1:1 red-violet complex. The absorption maximum is at 610 nm and the apparent molar absorptivity is 1.96 x 10(4) l.mole(-1).cm(-1). The apparent instability constant has been calculated to be 1.8 x 10(-4). The colour of the complex is stable for 24 hr. Beer's law is obeyed over the concentration range up to 0.8 mug ml . Titanium and zirconium interfere seriously.

摘要

铝在pH值为4 - 6时与偶氮氯膦I反应形成一种水溶性的1:1红紫色络合物。最大吸收波长为610 nm，表观摩尔吸光率为1.96×10⁴ l·mol⁻¹·cm⁻¹。计算得出表观不稳定常数为1.8×10⁻⁴。该络合物的颜色在24小时内稳定。在浓度高达0.8 μg/ml的范围内符合比尔定律。钛和锆会产生严重干扰。