期刊
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
卷 895, 期 -, 页码 123-130出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jchromb.2012.03.030
关键词
Di(isononyl)cyclohexane-1,2-dicarboxylate; DINCH; Plasticizer; Exposure assessment; Urinary metabolites; Human biomonitoring
资金
- Chemie Wirtschaftsforderungsgesellschaft mbH
- BASF SE
Di(isononyl)cyclohexane-1,2-clicarboxylate(DINCH) is a major substitute for some high molecular weight phthalates that adversely affect reproductive function. Like for the phthalates a broad exposure of the population has to be expected. We postulated the DINCH monoester (MINCH) and secondary oxidized metabolites (OH-MINCH, cx-MINCH and oxo-MINCH) as human metabolites and possible biomarkers of DINCH exposure. We developed an on-line HPLC-MS/MS method for their determination in human urine. Identification was performed with authentic standard substances and quantification via isotope dilution. The analytical method is highly selective and sensitive with limits of quantification (LOQ) between 0.05 mu g/l and 0.1 mu g/l. In a pilot study with 22 volunteers from the general German population oxidized DINCH metabolites were found in above 80% of the samples. OH-MINCH was most abundant (mean 0.71 mu g/l; maximum 3.69 mu g/l) followed by cx-MINCH (0.61 mu g/l; 2.82 mu g/l) and oxo-MINCH (0.33 mu g/l: 1.05 mu g/l). All three oxidized metabolites correlated strongly among each other (rho >= 0.76). MINCH was detected in one sample only and has to be regarded a weak marker of exposure. With this analytical method we are able to perform human metabolism studies to provide metabolic conversion factors and to investigate the extent of DINCH exposure in the general population. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据