PH indicator,acik-base indicator,complexometric indicator,redox indicator,precipitimetric indicator,indicatorWHC is the largest indicator plant in China
Product Category
    
Organic Indicator
    
Biological Dye
    
Reagent
    
xylenol orange
    
chemical net
    
alibaba
    
    
    
    
News and Knowledge

Spectrophotometric determination of hafnium with xylenol orange

Hafnium reacts similarly to zirconium with Xylenol Orange. The hafnium-Xylenol Orange complex shows almost identical maximum absorption as the zirconium-Xylenol Orange complex at 53 5-540 mμ.
The reagent gives a more sensitive reaction with hafnium than with zirconium. The molar absorption of the hafnium-Xylenol Orange complex was found to be 48,700 at 540 mμ. The formation constant of the hafnium complex was calculated as 3.2 × 106 in 0.3N perchloric acid. The conditions for using Xylenol Orange as a reagent for determining hafnium have been studied. Only zirconium or hafnium gives a purplish-red colour reaction with Xylenol Orange in 0.8.N perchloric acid in the presence of hydroxylamine hydrochloride, which masks both iron and bismuth.
Hafnium may be distinguished from zirconium since zirconium can be masked by hydrogen peroxide. Beryllium may be used as a demasking agent in the determination of zirconium or hafnium in the presence of fluoride.

 

when you want to buy Xylenol Orange,please contact us

Email:whcind@126.com

    
ph indicator, redox indicator, complexometric indicator ,precipitimetric indicator. 1,10-phenanthroline, phenolphthalein, thymol phenolphthalein, thymol blue,crystal violet, methylene blue, xylenol orange, bromocresol purple,dimethylglyoxime, sodium diethyldithiocarbamate, brilliant green, basic fuchsin