%0 Journal Article
%A YIN Hai-bo
%A HUANG Ming-hui
%A ZHANG Rui
%A WANG Wan-xiang
%A LIU Qian
%T Methods of Measuring Residual Ammonia in Fly Ash: Influence Factors and Comparison
%D 2019
%R 10.11988/ckyyb.20180426
%J Journal of Yangtze River Scientific Research Institute
%P 139-143
%V 36
%N 12
%X The residual ammonia in fly ash was measured by Nessler’s reagent spectrophotometry method, neutralization titration method, and ammonia-sensitive electrode method respectively in this paper. The main influence factors and their values were determined and the correlation among results of these three methods were investigated in detail. Results showed that the main influence factors of Nessler’s reagent spectrophotometry method were extraction solvent (best as 0.05 mol/L H<sub>2</sub>SO<sub>4</sub>), liquid ratio (optimum as 1∶10), and extraction time (optimum as  30 min); the main influence factors of neutralization titration method were absorption solution(best as 0.05mol/L H<sub>2</sub>SO<sub>4</sub>), sodium hydroxide content (optimum as  0.2 g) and distillation time (optimum as  30 min); the main influence factors of ammonia-sensitive electrode method were extracting solution (best as deionized water) and stirring time (optimum as  [10, 25]  min). In addition, the results of the three methods are of good correlation.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20180426