T. Hwang, H. Cheng
May 1, 1979
Citations
0
Influential Citations
10
Citations
Journal
Analytica Chimica Acta
Abstract
Abstract Nickel complexes of 2,2'-bipyridine and its dimethyl and diphenyl derivatives as well as biquinoline and dipyridyldisulphide were tested as ion exchangers in liquid membranes for nitrate-selective electrodes. The selectivity of these electrodes for nitrate increased with increasing size of the exchange site. Of the five ion exchangers tested, the 4,4'-diphenyl-2,2'-bipyridine complex showed the best responses; the limit of detection of nitrate was about 10 -6 M and responses were stable in the pH range 2–8.2.