Standard test method for oxides of nitrogen in gaseous combustion products (phenoldisulfonic acid procedure)

Journal Article · Wed Jan 01 04:00:00 EST 1975 · Annu. Book ASTM Stand.; (United States)

OSTI ID:7295196

This method covers the phenol-disulfonic acid colorimetric procedure for the determination of total oxides of nitrogen (nitrous oxide (N/sub 2/O) excepted) in gaseous effluents from combustion and other nitrogen oxidation processes. It is applicable to a concentration range of oxides of nitrogen as nitrogen dioxide (NO/sub 2/) of five to several thousand parts per million. The gas sample is admitted into an evacuated flask containing an oxidizing absorbent consisting of hydrogen peroxide in dilute sulfuric acid. The oxides of nitrogen are converted to nitric acid by the absorbent solution and the resulting nitrate ion is reacted with phenol disulfonic acid to produce a yellow compound which is measured colorimetrically. Calibration curves, prepared from samples of known nitrate content, are used to determine the amount of nitrate in the sample.

• OSTI ID: 7295196
• Journal Information: Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 26; ISSN ASTSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTROSCOPY
AIR POLLUTION
AROMATICS
CHALCOGENIDES
CHEMICAL COMPOSITION
COMBUSTION PRODUCTS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXY COMPOUNDS
INORGANIC ACIDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
PHENOLS
POLLUTION
SPECTROSCOPY
SULFONIC ACIDS
SULFURIC ACID