| Summary: | 碩士 === 國立清華大學 === 原子科學系 === 85 === Organochlorine pesticides (OCPs) were widely used for pasts
control in agriculture for the past few decades . Their
application has increased corp yields and has improved the
quantity of foods in the diet. However, organochlorine
pesticides can cause a range of adverse effects on human health,
such as cancer, genic effect and acute and chronic injury to the
nervous system. To estimate Taiwanese daily intakes and
assess the carcinogenic risk of organochlorine pesticides in
foods , such as BHC, heptachlor, aldrin,heptachlor epoxide,
endosulfan, DDE, dieldrin, endrin, DDD and DDT in food,meat,
fish and seafood were analyzed as major sources of these
pesticidesin the diet. Five clean-up procedures were evaluated
to determine the suitable packing material. Results shown that
the average recoveries of clean-up by Envi-Carb, Envi-18, tandem
column (Envi-18 and Florisil), Alumina-N and Florisil ranged
from 15 to 150%, 52 to 94%, 63 to 139%,48 to 101% and 63 to
122%, respectively. The Florisil cartridge was shown to have
less matrix effects and high recoveries of OCPs and was choosed
ofthis research. By using Florisil, the average recoveries of
meat, fish and seafood ranged from 69 to 125%, 51 to 105% and 69
to 125%. The OCPs residue in meat, fish and seafood are
ranged from 0.32 to 10.22 ng/g, 0.89 to 13.9 ng/g and 0.26 to
6.45 ng/g, respectively . Fromthe analytical results of this
study, meat, fish and seafood are demonstrated to be relatively
high hazardous materials for human. The high exposure frequency
of OCPs by meat, fish and seafood are endosulfan(I)(51.4) and
heptachlor epoxide(47.6%).The carcinogenic risk of the fish and
pork are 91.1*10-6 and 132*10-6, respectively. The total
carcinogenic risk of foods in this research is 251*10-6.
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