Evaluation of Organochlorine Pesticide Residues in the Mud Flat

연안(沿岸) 패류(貝類) 서식지(棲息地) 저니토중(底泥土中) 유기염소계(有機鹽素系) 농약(農藥)의 잔류평가(殘留評價)

After selecting four places in the main shellfish habitat, 118 items of the sample were collected in the mud flat from August to October in 1983, in order to analyze organochlorine pesticide residues by a gas chromatograph equipped with an electron capture detector. The results obtained were summarized as follows; ${\alpha}-BHC,\;{\gamma}-BHC\;&\;PCNB,\;heptachlor,\;{\gamma}-endosulfan,\;{\beta}-endosulfan,$ p, p'-DDE, dieldrin, o, p'-DDT and p, p'-DDT were detected in the range from 2 to 98 percent and their levels of mean residues ranged from trace to 0.041ppm, in the order of ${\gamma}-BHC\;&\;PCNB,\;{\alpha}-BHC,\;heptachlor{\approx}{\alpha}-endosulfan{\approx}p, p`-DDE{\approx}dieldrin{\approx}{\beta}-endosulfan{\approx}$o, p'-DDT, and p, p'-DDT. The mean of total residues in regions was Kangjin(0.058ppm), Kwangyang(0.080ppm), Yoch'on (0.016ppm), and Yonggwang(0.75ppm). ${\gamma}-BHC\;&\;PCNB$ peak were separated by column packed with DC-200. PCNB was identified by making a PCA(pentachloroaniline), the reduced derivative of PCNB, and this confirmed that PCNB residues were detected in the soil sample.

주요(主要) 패류(貝類) 서식지중(棲息地中) 서남해안(西南海岸) 4개지역(個地域)을 선정(選定), 1983년 8월부터 10월에 걸쳐 저니토(底泥土) 시료(試料)118점(點)을 채취(採取), gas chromatograph에 의하여 유기염소계(有機鹽素系) 농약(農藥)의 잔류량(殘留量)을 분석(分析)한 결과(結果) ${\alpha}-BHC,\;{\gamma}-BHC$와 PCNB, heptachlor, ${\alpha}-endosulfan,\;{\beta}-endosulfan,$ p, p'-DDE, dieldrin, o, p'-DDT 및 p, p'-DDT 등(等)이 M$2{\sim}98%$의 검출빈도(檢出頻度)를 보였고 그 평균잔류수준(平均殘留水準)은 ${\gamma}-BHC$와 $PCNB>{\alpha}-BHC>heptachlor{\approx}{\alpha}-endosulfan{\approx}\;p,\; p'-DDE{\approx}dieldrin{\approx}{\beta}-endosulfan{\approx}\;o,\;p'-DDT{\approx}\;p,\;p'-DDT$순(順)으로 $trace{\sim}0.04ppm$범위(範圍)였다. 지역별(地域別) 총잔류량(總殘留量)의 평균(平均)은 강진(康津), 광양(光陽), 여천(麗川) 및 영광(靈光)이 각각(各各) 0.058, 0.080, 0.016 및 0.075ppm이었다. DC-200 column을 사용(使用)하여 ${\gamma}-BHC$와 PCNB의 peak를 분리(分離)하였고 PCNB는 이를 환원(還元) 유도체(誘導體)인 PCA로 만들어 동정(同定)함으로써 공시시료중(供試試料中) PCNB가 잔류(殘留)됨을 확인(確認)하였다.