Tentative test method for nitrogen oxides (combined) content in the atmosphere by the Griess--Saltzman reaction

Journal Article · Sat Jan 01 00:00:00 EST 1977 · Annu. Book ASTM Stand.; (United States)

OSTI ID:7090310

A spectrophotometric method is described for the determination of the combined NO/sub 2/ and NO in the atmosphere. The NO is quantitatively converted to NO/sub 2/ by a chromic acid oxidizer, and this resulting NO/sub 2/ plus the NO/sub 2/ already present in the air sample are absorbed in an azo-dye forming reagent. Within 15 min a red-violet color is produced which is measured spectrophotometrically at 550 nm. The method is applicable to the determination of 0.002 to 5 ppM.

• OSTI ID: 7090310
• Journal Information: Annu. Book ASTM Stand.; (United States), Vol. 26; Other Information: Designation: D--3608-77T
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR
CHEMICAL ANALYSIS
NITRIC OXIDE
SPECTROPHOTOMETRY
NITROGEN DIOXIDE
AZO DYES
SENSITIVITY
AZO COMPOUNDS
CHALCOGENIDES
DYES
FLUIDS
GASES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)