TY - GEN
T1 - Revisiting the method for measuring ammonia concentrations in ambient air or exhaust air stream using acid traps
AU - Ndegwa, Pius M.
AU - Vaddella, Venkata K.
AU - Joo, Hungsoo
AU - Hristov, Alexander N.
PY - 2009
Y1 - 2009
N2 - Strong acid solutions have been widely used in acid traps to determine concentrations of ammonia in ambient air or exhaust air stream. A study was carried out to examine factors that might affect the efficiency of sulfuric acid traps. An inverse relationship between the efficiency of the acid traps and the amount of ammonia to be trapped was observed. For the same volume of acid, the efficiency of the acid trap increased with the acid depth but overall, the efficiency at any given acid depth decreased as the amount of ammonia through the trap increased. The efficiency of the acid traps decreased at similar rates as the concentration of ammonia in the sample air increased but the efficiency of the trap was significantly higher at the lower airflow rate. Multi-point calibrations within the entire range of target measurements is recommended to provide accurate corrections of the measurements. This is an abstract of a paper presented at the 102nd AWMA Annual Conference (Detroit, MI 6/16-19/2009).
AB - Strong acid solutions have been widely used in acid traps to determine concentrations of ammonia in ambient air or exhaust air stream. A study was carried out to examine factors that might affect the efficiency of sulfuric acid traps. An inverse relationship between the efficiency of the acid traps and the amount of ammonia to be trapped was observed. For the same volume of acid, the efficiency of the acid trap increased with the acid depth but overall, the efficiency at any given acid depth decreased as the amount of ammonia through the trap increased. The efficiency of the acid traps decreased at similar rates as the concentration of ammonia in the sample air increased but the efficiency of the trap was significantly higher at the lower airflow rate. Multi-point calibrations within the entire range of target measurements is recommended to provide accurate corrections of the measurements. This is an abstract of a paper presented at the 102nd AWMA Annual Conference (Detroit, MI 6/16-19/2009).
UR - http://www.scopus.com/inward/record.url?scp=77952318359&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952318359&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77952318359
SN - 9781615676514
T3 - Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA
SP - 2678
EP - 2689
BT - 102nd Air and Waste Management Association Annual Conference and Exhibition 2009
T2 - 102nd Air and Waste Management Association Annual Conference and Exhibition 2009
Y2 - 16 June 2009 through 19 June 2009
ER -