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Rapid determination of nitrogen oxides with use of phenoldisulfonic acid.

Authors
Coulehan-BA; Lang-HW
Source
Environ Sci Technol 1971 Feb; 5(2):163-164
NIOSHTIC No.
10010500
Abstract
A rapid, quantitative batch procedure for analysis of atmospheric nitrogen oxide samples (NO + NO2, commonly referred to as NOx) from mines, tunnels, and raw or dilute diesel exhaust is described. This modification of the phenoldisulfonic acid nitration procedure eliminates the time-consuming evaporation step and two transfer steps of the original procedure. Samples are collected in evacuated bottles containing an absorbent solution and hydrogen peroxide to completely oxidize the gas-phase NOx to nitric acid. After destruction of excess oxidant, an aliquot of the absorbed sample is added to the phenoldisulfonic acid reagent in a 25-ml. volumetric flask which is used as the reaction vessel for subsequent nitration and neutralization. This modified method can double or triple the number of analyses per day by the original method.
Keywords
Analytical-processes; Analytical-chemistry; Underground-mining; Diesel-exhausts; Diesel-emissions; Exhaust-gases; Nitrous-oxides; Nitrogen-oxides; Nitrogen-compounds
CODEN
ESTHAG
Publication Date
19710201
Document Type
OP; Journal Article
Fiscal Year
1971
NTIS Accession No.
NTIS Price
Identifying No.
OP 32-71
Issue of Publication
2
ISSN
0013-936X
NIOSH Division
PRC
Source Name
Environmental Science and Technology
State
PA
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