Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Sulphur Dioxide Reference Materials.
Author Taylor, J. K. ; Deardorff., E. R. ;
CORP Author National Bureau of Standards, Washington, D.C.;Environmental Protection Agency, Research Triangle Park, N.C.
Year Published 1975
Report Number NBSIR-75-662;
Stock Number COM-75-10420/8
Additional Subjects Sulfur dioxide ; Sodium sulfites ; Chemical analysis ; Stability ; Sugar alcohols ; Solutions ; Standard reference materials ; Pararosaniline method ; Air pollution detection
Library Call Number Additional Info Location Last
NTIS  COM-75-10420/8 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 17p
The development of reference materials to serve for quality control and performance evaluation of measurements of sulfur dioxide by the pararosaniline method is described. Powder samples consisting of sodium sulfite dispersed in mannitol can be prepared to evaluate measurements for the concentration levels of ambient interest. The samples are sufficiently stable in routine use, with a service life of at least three months. By the use of a series of five samples of graded sulfite content, measurement errors greater than five percent are significantly detected. A detailed procedure for preparation of the samples is included. Preliminary studies of an alternate method for preparation of quality control samples, by a freeze-drying process are also described.