Short Communications On the Saltzman factor
article
The nitrite equivalent of nitrogen dioxide in its determination in polluted air by means of a Griess type reagent is commonly called the Saltzman factor. Values ranging from 0.5 to 1.000 have been reported, but discussion about the 'right' value continues. The results of experimental calculations are presented to demonstrate that there is no set right value, but that it depends on circumstances and may be more or less chosen at will. No explanation was found for the differences reported. The results are summarized, and illustrate that the Saltzman factor is not a constant, but is inversely related to NO production and varies according to the expectations based on the expounded reaction mechanisms. In practice, a method with a high and therefore more constant factor would be recommended, such as the use of sulfanilamide instead of sulfanilic acid and a NEDA (naphthylethylene diamine dihydrochloride) concentration as low as possible without decreasing the collection efficiency too much with the air flow rate and washing bottle.
TNO Identifier
227890
ISSN
13522310
Source
Atmospheric Environment, 9(11), pp. 1027-1029.
Collation
3 p.
Pages
1027-1029
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