||Adequacy of Sampling Trains and Analytical Procedures Used for Fluoride.
Mitchell, William James;
||Environmental Monitoring and Support Lab., Research Triangle Park, N.C. Quality Assurance Branch.
Ion selective electrodes;
Air pollution detection;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Liquid nitrogen-cooled cold-traps were used to establish the collection efficiency for fluorides of two different source sampling trains at primary aluminum reduction plants and wet-process phosphoric acid plants. It was found that the glass frit filter support commonly used in stationary source sampling trains retained fluoride during sampling; therefore, the filter should not be placed before the impingers when sampling for fluoride. Also described are the results of a collaborative test on two standard distillation procedures for fluorides; sulfuric acid distillation and steam distillation from perchloric acid. The results show that the predominant source of imprecision in both methods is the distillation step itself.
||Pub. in Atmospheric Environment, v10 p865-872 1976.
|NTIS Title Notes
||+++Reprint: Adequacy of Sampling Trains and Analytical Procedures Used for Fluoride.
|PUB Date Free Form
||8 Mar 76
||13B; 2A; 68A; 98A; 99A
||PC A02/MF A01