酥油中汞和有机氯的本底值调查

A SURVEY OF THE BACKGROUD OF MERCURY AND ORGANOCHLORINE PRESENT IN TEBETEAN BUTTER

作者报道了酥油中汞，有机氯的本底值调查结果。检查６５份酥油中汞，检出范围０～０．１４ｐｐｍ，均值０．０１５ｐｐｍ，９５％正常值上限为０．１０ｐｐｍ，８４．２％正常值上限为０．０５０ｐｐｍ，建议以０．０５ｐｐｍ作为制定酥油汞含量的卫生标准之参考值；检查４８份酥油中有机氯。其中ＤＤＴ未检出；六六六仅检出α、β两种异构体，检出范围０．１６～１．５１ｐｐｍ，均值０．６６ｐｐｍ，９５％正常值上限为１。３ｐｐｍ，建议以１．３ｐｐｍ作为制定酥油中六六六的卫生标准的参考值。

The backgroud levels of mercury and organochlorine were investigsated.The results showed that Mercury ranged from to 0.14ppm (X0.015ppm) and the upper limit of 84.2%being 0.050ppm in 65 Samples and no dichloro-diphenyl-trichloroethane was detected,only α-and β-isomers of benzene hexachloride were shown ranging from 0.16 to 1。51ppm (X0.66ppm).According to this survey,the authors suggest 0.05ppm for mercury and 1.3ppm for organochlorine as the reference level of hygienic Standard.