Deuterium Labelled Nonylphenols in anin-vitroModel of Percutaneous Absorption of Environmental Xenoestrogens
作者:
B. Blume,
M. Kietzmann,
P. Kränke,
M. Möder,
S. Schrader,
M. Wahren,
期刊:
Isotopes in Environmental and Health Studies
(Taylor Available online 2000)
卷期:
Volume 36,
issue 1
页码: 3-9
ISSN:1025-6016
年代: 2000
DOI:10.1080/10256010008032928
出版商: Taylor & Francis Group
关键词: Deuterium;hydrogen isotope exchange;isotope dilution analysis;non-ylphenol;percutaneous absorption skin;trace determinations;xenoestrogens
数据来源: Taylor
摘要:
A technical mixture of isomeric nonylphenols NP is formed as rather persistent degradation product of nonionic surfactants and has become widespread in the environment,e.g., in surface waters. Information about possible pathways for incorporation is needed for risk assessments, as NP has estrogenic properties. NP uptake after skin contact was determined using isolated and perfused bovine udders as models for human skin. NP-d2labelled in the positions ortho to the OH-group was prepared by an exchange procedure which did not measureably change the relative amount of isomers. Samples of udder perfusate, milk equivalent produced during the experiments and skin tissue were taken immediately before administration of 500 mg or 50 mg NP-d2on an udder skin area of 200cm2and then for 5 h. They were analyzed by GC-MS for NP and NP-d2after cleanup by steam distillation and final extraction with SPME fibres. The results are an unambiguous proof of the penetration of NP into the capillary system of living mammals after skin contact.
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