ISSN:
1436-5073
Keywords:
carbonate determination
;
uranyl quinolin-8-olate
;
benzyltributyl-ammonium
;
ligand exchange
;
spectrophotometry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract An indirect Spectrophotometric determination of carbonate is proposed. Dilute chloroform solutions of uranyl quinolin-8-olate are shaken with aqueous solutions of anion. The decoloration produced by ligand exchange varies linearly with the anion concentration. The addition of an ethanolic solution of benzyltributylammonium bromide to the organic solution instead of an excess of quinolin-8-ol improves the method. Different variables (pH, shaking time, ionic medium) were optimized. Carbonate concentration can be determined over the range 10–40 μg ml−1, showing a linear dependence, giving a precision of 2.4% for 30 μg ml−1 of carbonate in the aqueous phase. The tolerance levels of foreign ions are increased. Analysis of carbonate in mineral and sea waters and pharmaceutical samples was performed with success.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01244062
