By Lawrence H. Keith, Tammy L. Jones, Larry L. Needham
Endocrine disruptors are chemicals that, between different damaging results, reason delivery defects in people and animals. They comprise DES, an anti-nausea drug utilized in the Fifties while pregnant, and will be present in over 70 universal chemical compounds starting from insecticides to plastics. This booklet seems at fresh advancements within the sector and examines screening/monitoring tools and analytical techniques.
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Additional resources for Analysis of Environmental Endocrine Disruptors
Determinations for these suspected ED's in a variety of different foods and food simulating solvents require different analytical procedures because of the varied matrices and polarities of the analytes. Also, different means of detection will have to be used to gain maximum selectivity and sensitivity for the analytes. However, because of the variety of procedures employed and the space restrictions of this publication, experimental procedures will be generalized and this paper will place emphasis on the results rather than the intricacies of the varied methods use to obtain the data.
Further work may include other effects as well as the interaction of mixtures. Thus, the challenge to EDSTAC is enormous and complex: to establish a program for evaluating the toxicity of thousands of chemical compounds and to implement this program into a feasible national process. In August 1998, EDSTAC met its first deadline by publishing and circulating a final draft strategy for the screening and testing of suspect EDCs. The implementation of the plan is Congressionally mandated to be accomplished by August 1999.
Figure 1 represents the GC-MS analysis of the hexane extract of one of the surveyed packages, a PVC produce wrap. The upper portion of thefigureis the total ion chromatogram of the hexane soluble semi-voiatiles extracted from the wrap. The major peak in the chromatogram is di-2ethylhexyl adipate, the primary monomelic plasticizer. 5 to 12 min (NP is prepared by the alkylation of phenol with the trimer of propylene. The propylene trimer consists of many isomers). The GC-MS analysis of alkyl phenol standards indicates that the major NP isomers have highly branched nonyl groups.
Analysis of Environmental Endocrine Disruptors by Lawrence H. Keith, Tammy L. Jones, Larry L. Needham