Author :
Ensafi, Ali A.,Kolagar, M. S
Title of Article :
Catalytic kinetic determination of ultratrace amounts of nitrite with detection by differential pulse polarographic method
Title Of Periodical :
ANALYTICA LETTERS
Descriptors :
Catalytic,Differential pulse polarography,Nitrite
Abstract :
Nitrite ion can be determined with a high degree of accuracy and sensitivity by differential pulse polarography, based on the catalytic effect of nitrite on the oxidation of Nile blue A in the presence of sodium bromate at acidic media and 25 C. The reaction rate was monitored by measuring the differential pulse polarography peak current of the Nile blue A. Nitrite concentration of 2 - 2000 ng.ml**-1 can be determined by the fixed time method of 3 min from initiation of the reaction. The limit of detection was 0.4 ng.ml**-1. The effects of more than forty ions on nitrite determination were studied. The method was used to determine nitrite concentration in processed river and spring water.
