12 February 1993 Chemiluminescence determination of trace amounts of ammonia and halogen species in the environment
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Abstract
Gaseous or aqueous ammonia and halogen species were determined by chemiluminescence (CL) method based on the new CL reaction of ammonia and halogen species using the gas-liquid contact type reaction vessel. CL produced in the reaction of ammonia and chlorine has the maximum intensity at 690 nm and that with bromine has the maximum intensity at 850 nm. Detection limit of ammonia was 7 ppb (V/V) and relative standard deviation for 5 measurements at 4 ppm (V/V) was 2.5%. This method could be applied for the determination of ammonium cation or hypochlorite anion in liquid phase. Detection limit of ammonium cation was 20 ppb (W/W) and standard deviation for 5 measurements at 5 ppm (W/W) was 1.2%. Gaseous chlorine and bromine could be continuously determined using this CL reaction. Ammonium in acid rain was measured by the developed method.
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Yasuaki Maeda, Yasuaki Maeda, Norimichi Takenaka, Norimichi Takenaka, } "Chemiluminescence determination of trace amounts of ammonia and halogen species in the environment", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); doi: 10.1117/12.140181; https://doi.org/10.1117/12.140181
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