Study on Endocrine Disrupting Chemicals Alachlor Pollution of Cereals and Vegetables in Taiwan

• Main Authors: Sin-Yu Liao, 廖心渝
• Other Authors: I-Fang Mao
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/46370322446202625025

碩士 === 中山醫學大學 === 職業安全衛生學系碩士班 === 102 === Alachlor and butachlor has been widely used as herbicide, it is an important global pollutant for environmental hormone effect and bioaccumulation effect in biota and it could cause health effect and cancer. Alachlor contaminates biota with food chain and were detected in various environmental matrices, including water, sediment and air and various organisms, including aquatic and terrestrial ecosystems, even human. For the purpose of assessing the Taiwan resident individual exposure source and exposure levels of alachlor.Water pollution was one of major alachlor exposure sources according to previous literatures.This study will determine alachlor concentration of tape water & reservoir water of general area and high pollutant area. Dichloromethane was applied to dissolve the grinded cereals and vegetables sample. The concentrated dichloromethane solution was extracted by the saturated acetone/hexane/acetonitrile solution. The residues were then eluted by hexane and ethyl ether solution (85＋15，v/v) through a SPE Tube. The final purified samples were quantified by gas chromatography–mass spectrometry. The samples of reservoir water were concentrated with SPE-DEX4790.The concentrated dichloromethane solution was eluted by dichloromethane.The residues were then eluted by ethyl acetate.The final purified samples were quantified by gas chromatography–mass spectrometry. This study determined 6 types of cereals and vegetables in Taiwan (n＝125). The results indicated that corn contained the highest concentration of alachlor, with the concentration of 17.839±16.908 ng/100g. The alachlor concentration of brown rice was 9.205±8.970 ng/100g, which was the second high. This study determined 2 types of reservoir water in Taiwan (n＝14).The results indicated that Taihu Reservoir raw water contained the highest concentration of alachlor, with the concentration of 1080μg/L. The alachlor concentration of Bansin Water Treatment Plant raw water was 298μg/L, which was the second high. This study shows that corn contained the highest amount of alachlor,corn are 2～3 times of others. The detection rate of alachlor in corn was 67% (14/21),the study suggested eat corn or susceptible alachlor contaminated crops should be particularly cleaning.Butachlor detect that of cereals and vegetables detection rate were 25% (21/83) and 33% (14/42). Reservoir raw water alachlor content detection rate was 43% (3/7), and treated water alachlor content detection rate was 43% (3/7). Sources of alachlor pollution might be related to water pollution and air pollution.