INVESTIGATION OF THE MOLYBDATE(II)-3-HYDROXYFLAVONE COMPLEX

被引：8
|
作者：
MALESEV, D
RADOVIC, Z
JELIKICSTANKOV, M
机构：
[1] Faculty of Pharmacy, Institute of Physical Chemistry, Beograd, YU-11001
来源：
MONATSHEFTE FUR CHEMIE | 1991年 / 122卷 / 6-7期
关键词：
SPECTROPHOTOMETRIC METHODS; PH-METRY; 3-HYDROXYFLAVONE; NATRIUM MOLYBDATE;
D O I：
10.1007/BF00809794
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Investigations on the composition of the molybdate(II)-3-hydroxyflavone complex and its stability constant have been carried out in 70% ethanolic solutions at room temperature (20-degrees-C), in the presence of a buffer at pH 6.30 +/- 0.05 and ionic strength 0.015. It has been found that a complex [MoO3(C15H9O3)2(2-)] whose stability constant ranges from 15.13 at pH 6.25 to 13.02 at pH 7.00 is formed. Conditions are given for the determination of 3-hydroxyflavone by means of the reaction of complex formation in 50% ethanol at pH 6.60 +/- 0.05 and an ionic strength of 0.0225.
引用
收藏
页码：429 / 434
页数：6
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