||Effects of residual organic matter on elemental analyses by spark source mass spectrography (SSMS) : final report /
McGregor, Kenneth T. ;
Myatt, B. M. ;
Clark, R. F. ;
Bause, D. E. ;
||GCA Corp., Bedford, MA. GCA Technology Div.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
||EPA/600/2-85/125; GCA-TR-81-94-G; EPA-68-02-3129
Air--Pollution--Research--United States. ;
Chemical analysis ;
Organic compounds ;
Mass spectrometry ;
Air pollution ;
Experimental design ;
Industrial wastes ;
Combustion products ;
Spark source mass spectroscopy ;
Stationary sources ;
Air pollution detection ;
Standard reference materials
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||x, 207 pages : illustrations
The report gives results of research to define the effect of organics in SSMS and to evaluate several sample preparation methods for their removal. Samples of known organic content were fabricated by diluting NBS SRM 1633 fly ash (spiked with several trace elements) with a mixture of organic compounds. Samples containing 0, 10, 50, and 90 percent organic material were developed. These fabricated samples and NBS SRM 1632 coal were analyzed by three laboratories using SSMA without prior pretreatment (neat) and after processing by several preparation procedures. The effects of organic material on neat SSMS analysis were assessed for the various concentration levels. Samples containing < or = 50 percent organic material could be successfully analyzed by SSMA without pretreatment. Difficulties were encountered with 90 percent organics. Four preparation procedures (Parr oxygen bomb, HF bomb, low temperature ashing, and mineral acid extraction) were evaluated for removal of organic interference and maintenance of sample integrity for SSMS, AAS (primarily Hg), and ICP analyses. Conclusions were drawn regarding their suitability for use in the Level 1 and/or 2 analysis schemes and the benefits of further research.
"October 1985." "Contract no. 68-02-3129." "Performing organization report no. GCA-TR-81-94-G." Microfiche.