Chemiluminescence nitrogen detection in ion chromatography for the determination of nitrogen-containing anions.
Chemiluminescence nitrogen detection (CLND) provides equimolar response for nitrogen-containing ions such as nitrate, nitrite, cyanide, ammonium and tetradecyltrimethylammonium. Only azide yields a lower response. Nitrite, azide and nitrate are separated on a Dionex AS11 column using 5 nM NaOH as eluent with a 3 microM (1 ng N) limit of detection. Matrices, such as 1:10 diluted seawater, do not degrade these detection limits. CLND also provides equally sensitive (limit of detection 3 microM, 78 ppb) detection of weak acids such, as cyanide, which yield poor sensitivity with suppressed conductivity detection.
Lucy
C A
CA
Department of Chemistry, University of Alberta, Edmonton, Canada. charles.lucy@ualberta.ca
Harrison
C R
CR
D000838:Anions / Q000032:analysis*; D002853:Chromatography, Liquid / Q000379:methods*; D008163:Luminescent Measurements; D009584:Nitrogen / Q000737:chemistry*; D012680:Sensitivity and Specificity
D000838:Anions; D009584:Nitrogen