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Monobromopolychlorodibenzo-p-dioxins and dibenzofurans in municipal waste incinerator flyash.
Tong, H Y; Monson, S J; Gross, M L; Huang, L Q.
Afiliação
  • Tong HY; Department of Chemistry, University of Nebraska, Lincoln 68588-0304.
Anal Chem ; 63(23): 2697-705, 1991 Dec 01.
Article em En | MEDLINE | ID: mdl-1767938
Capillary column gas chromatography/high-resolution mass spectrometry was used in two different selected-ion monitoring modes to analyze trace levels of monobromopolychlorodibenzo-p-dioxins and dibenzofurans (BPCDD/Fs) in municipal waste incinerator (MWI) flyash. The mass profile monitoring mode is well-suited for identification of unknown compounds in uncharacterized matrices because it has superior diagnostic capability. Owing to its high sensitivity, conventional peak top monitoring was used to quantify, on the basis of polychlorodibenzo-p-dioxin and dibenzofuran (PCDD/F) standards, the BPCDD/Fs in the sample. The results were compared with those obtained by using two commercial BPCDDs as standards, and the latter results are 4 times greater, indicating the need for appropriate standards. The high certainty and sensitivity obtained from these two mass spectrometric techniques combined with the resolving power of capillary gas chromatography enabled us to compare for the first time the isomer distribution patterns between BPCDD/Fs and their PCDD/F analogues at a high confidence level. The comparison indicates BPCDD/Fs and PCDD/Fs found in MWI flyash are closely related and that many BPCDD/Fs with a 2,3,7,8-substitution configuration may be present in MWI flyash.
Assuntos
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Base de dados: MEDLINE Assunto principal: Resíduos / Benzofuranos / Carbono / Eliminação de Resíduos / Poluentes Ambientais / Dibenzodioxinas Policloradas Tipo de estudo: Guideline Idioma: En Ano de publicação: 1991 Tipo de documento: Article
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Base de dados: MEDLINE Assunto principal: Resíduos / Benzofuranos / Carbono / Eliminação de Resíduos / Poluentes Ambientais / Dibenzodioxinas Policloradas Tipo de estudo: Guideline Idioma: En Ano de publicação: 1991 Tipo de documento: Article