Journal
TALANTA
Volume 64, Issue 2, Pages 308-312Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2004.02.018
Keywords
murexide; fluorimetric determination; nitrite; nitrate
Categories
Ask authors/readers for more resources
A highly sensitive and virtually specific method has been developed for the trace and ultra trace 5 ng ml(-1)-1 mug ml(-1) fluorimetric analysis of nitrite. The method is based on the quenching action of nitrite on the native fluorescence of murexide (ammonium purpurate) [lambda(ex) = 349.0 nm, lambda(em) = 444.5 nm] in the acid range of 0.045-0.315 (M) H2SO4. The method is very precise and accurate (S.D. = +/-0.4877 and R.S.D. = 0.4878% for the determination of 0.1 mug ml(-1) of nitrite in 11 replicates). Relatively large excesses of over 35 cations and anions do not interfere. The proposed technique has been successfully applied for the determination of nitrite and nitrate in ground water, surface water and sea water, nitrite in soil and nitrate in forensic samples. The method has also been extended for the analysis of NOx in air. (C) 2004 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available