Transfer of Airborne Polychlorinated Dibenzo-p-dioxins and Dibenzofurans into Dairy Milk

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• 作者：Franz Schuler ; Peter Schmid ; and Christian Schlatter
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：1997
• 出版时间：October 1997
• 年：1997
• 卷：45
• 期：10
• 页码：4162 - 4167
• 全文大小：101K
• 年卷期：v.45,no.10(October 1997)
• ISSN：1520-5118

文摘

Polychlorinated dibenzo-p-dioxins (PCDD) and dibenzofurans(PCDF) in dairy milk predominantlyoriginate from contaminated fodder ingested by the cows. In thepresented field study transferrates were determined for 12 2,3,7,8-chlorosubstituted PCDD/F on theirpathway from atmosphericdeposition onto grass and into the milk of dairy cows. Samples ofaerial deposition and fodderwere collected simultaneously over periods of 35-100 days; milksamples were taken at the ends ofthese sampling periods. In the transfer from air onto fodder about35% of the atmospheric PCDD/Ffallout as determined by passive sampling using Bergerhoff vessels wasretained on the grass. Nocongener specificity was observed in this transfer step. Thelevels in atmospheric fallout and ingrass varied considerably among single samples, whereas the PCDD/Fconcentrations in milk wererather constant. However, the averaged transfer rates from grassto milk were in good accordancewith data reported in the literature.Keywords: PCDD; PCDF; atmospheric deposition; grass; cow'smilk