主要 貝類 棲息地中 西南海岸 4個地域을 選定, 1983년 8월부터 10월에 걸쳐 底泥土 試料118點을 採取, gas chromatograph에 의하여 有機鹽素系 農藥의 殘留量을 分析한 結果 α-BHC, γ-BHC와 PCNB, heptachlor, α-endosulfan, β-endosulfan, p, p`-DDE, dieldrin, o, p`-DDT 및 p, p`-DDT 等이 2∼98%의 檢出頻度를 보였고 그 平均殘留水準은 γ-BHC와 PCNB>α-BHC>heptachlor　α-endosulfan　p, p`-DDE　dieldrin　β-endosulfan　o, p`-DDT　p, p`-DDT順으로 trace∼0.04ppm範圍였다. 地域別 總殘留量의 平均은 康津, 光陽, 麗川 및 靈光이 各各 0.058, 0.080, 0.016 및 0.075ppm이었다. DC-200 column을 使用하여 γ-BHC와 PCNB의 peak를 分離하였고 PCNB는 이를 還元 誘導體인 PCA로 만들어 同定함으로써 供試試料中 PCNB가 殘留됨을 確認하였다.

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; α-BHC, γ-BHC & PCNB, heptachlor, α-endosulfan, β-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 γ-BHC & PCNB, α-BHC, heptachlor　α-endosulfan　p, p`-DDE　dieldrin　β-endosulfan　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). γ-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.