SPECTROPHOTOMETRIC DETERMINATION OF URANIUM IN NATURAL-WATER WITH THENEW CHROMOGENIC REAGENT P-CARBOXYCHLOROPHOSPHONAZO

Authors
YANG R LU Y SONG GL WANG T PAN JM
Citation
R. Yang et al., SPECTROPHOTOMETRIC DETERMINATION OF URANIUM IN NATURAL-WATER WITH THENEW CHROMOGENIC REAGENT P-CARBOXYCHLOROPHOSPHONAZO, Analytica chimica acta, 314(1-2), 1995, pp. 95-99
Citations number
15
Categorie Soggetti
Chemistry Analytical
Journal title
Analytica chimica acta → ACNP
ISSN journal
00032670
Volume
314
Issue
1-2
Year of publication
1995
Pages
95 - 99
Database
ISI
SICI code
0003-2670(1995)314:1-2<95:SDOUIN>2.0.ZU;2-7
Abstract
The synthesis and purification of p-carboxychlorophosphonazo (CPApK) a re described. In acidic medium, uranium forms a sensitive beta-type co mplex with CPApK (epsilon = 1.78 x 10(5) l mol(-1) cm(-1) at 714 nm). In the presence of polyvinyl alcohol (PVA), the molar absorptivity inc reases further(epsilon = 2.72 x 10(5) l mol(-1) cm(-1)). Beer's law is obeyed for 4-12 mu g of uranium in 25 ml of solution. A method has be en satisfactorily developed for the spectrophotometric determination o f uranium in seawater and lake water with a prior adsorption and desor ption.