Evaluation of Saltzman and phenoldisulfonic acid methods for determining NO/sub x/ in engine exhaust gases

Journal Article · Sat Nov 01 00:00:00 EST 1969 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1969.10469354· OSTI ID:5417379

Groth, R H; Calabro, D S

The two methods normally used for the analysis of NO/sub x/ are the Saltzman and the phenoldisulfonic acid technique. This paper describes an evaluation of these wet chemical methods to determine their practical application to engine exhaust gas analysis. Parameters considered for the Saltzman method included bubbler collection efficiency, NO to NO/sub 2/ conversion efficiency, masking effect of other contaminants usually present in exhaust gases and the time-temperature effect of these contaminants on store developed solutions. Collection efficiency and the effects of contaminants were also considered for the phenoldisulfonic acid method. Test results indicated satisfactory collection and conversion efficiencies for the Saltzman method, but contaminants seriously affected the measurement accuracy particularly if the developed solution was stored for a number of hours at room temperature before analysis. Storage at 32/sup 0/F minimized effect. The standard procedure for the phenoldisulfonic acid method gave good results, but the process was found to be too time consuming for routine analysis and measured only total NO/sub x/. 3 references, 9 tables.

• Research Organization: Pratt and Whitney Aircraft, East Harford, CT
• OSTI ID: 5417379
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Vol. 19:11
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
42 ENGINEERING
AIR SAMPLERS
EVALUATION
EXHAUST GASES
CHEMICAL ANALYSIS
NITROGEN DIOXIDE
ECOLOGICAL CONCENTRATION
AIR POLLUTION
EFFICIENCY
EXPERIMENTAL DATA
SAMPLING
STORAGE
CHALCOGENIDES
DATA
EQUIPMENT
FLUIDS
GASEOUS WASTES
GASES
INFORMATION
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLLUTION
SAMPLERS
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
424000 - Engineering- Pollution Control Equipment- (1980-1989)