高分辨质谱检测牛奶中POPs
Polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) areclasses of related environmental pollutants produced through diverse sources or industrial use and are known tostrongly bio-accumulate and produce multiple toxic endpoints in animals and humans 1,2 . The 2,3,7,8-tetrachlorodibenzobenzo-p-dioxin (TCDD) isomer has been classified as a group 1A human carcinogen by IARC 2 .PCBs with dioxin-like properties are often measured with the PCDD/Fs. These three classes of chemicals are listedas persistent organic pollutants (POPs) by the Stockholm convention designated for world-wide reduction in theenvironment 1 .The primary route of non-occupational human exposure to PCDDs and PCDFs is foods and animalfeeds 3-5 . Monitoring programs established are aimed to aid efforts to control contamination in foods and animalfeeds 5 . Central to these efforts are confirmatory methods capable of measuring these chemicals at lowconcentrations in foods. We investigated an orbital trapping mass spectrometer for the measurement of PCDD/Fsand PCBs at low concentrations in whole cow’s milk.