摘要:

Twenty individual chlorobiphenyls (CBs) have been determined in marine mammals. The more toxic non-orthoand mono-orthoCBs have been separated from di and tri-orthoCBs using a pyrenyl silica HPLC column prior to the final determination by capillary GC. The comparative metabolism of the biologically active CBs in whale, porpoise, dolphin and seal tissue is described. An estimate of the TCDD toxic equivalence concentration (TEC) for the non ortho and mono ortho CBs is made.

ISSN:0306-7319    

DOI:10.1080/03067319208027021

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The technique most widely used for chromium determination in biological and environmental samples is atomic absorption spectrometry with flame (FAAS) or graphite furnace (GFAAS). In this regard, there are many articles in the literature dealing with the effect of the interferences upon chromium solutions of different oxidation state. These effects are not well established and the results are contradictory.

ISSN:0306-7319    

DOI:10.1080/03067319208027022

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The composition of Chlorofen, a technical formulation of polychlorinated biphenyls (PCBs) produced in Poland, has been investigated using GC-ECD and GC-MS techniques. Chlorofen was a highly chlorinated mixture (63.6% Cl), mainly composed of PCB members with 5 to 9 chlorine atoms which comprised 99.55% of total PCBs. The average number of Cl per molecule in Chlorofen was 7.3, and the average molecular weight was 405.4. It was found that Chlorofen contained at least 59 PCB congeners with the major components such as IUPAC No. 153 of hexa-, 176, 180, 187 of hepta-, 194, 195, 198, 201/196 of octa- and 206 of nonachlorobiphenyls. Additionally, three components of highly toxic non-orthochlorine substituted coplanar PCBs (IUPAC Nos 77, 126 and 169) were also quantified at a concentration of 0.52, 0.25 and 0.43 μg g−1, respectively, the latter (169), showing a greater content than in Aroclor and Kanechlor formulations.

ISSN:0306-7319    

DOI:10.1080/03067319208027023

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Used motor oils are products of environmental concern as they contain polycyclic aromatic hydrocarbons and high levels of heavy metals. A method using charge transfer chromatography for the preconcentration of PAH in used oil and their subsequent separation on a special C18 bonded silica gel is described in this paper. The method is applied to the measurement of PAH in semi-synthetic and mineral lubricating oils used in gasoline and diesel motors.

ISSN:0306-7319    

DOI:10.1080/03067319208027024

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0306-7319    

DOI:10.1080/03067319208027020

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor