- 期刊
台灣地區魚貝類中多氯聯苯殘留量調查
Survey on the Polychlorinated Biphenyls Residues in Fish and Shellfish in Taiwan
摘要
為了解台灣地區市售魚貝類中多氯聯苯的殘留量情形，92年度由各縣市漁會，協助至該轄區之養殖場或自行至傳統市場進行採樣，共計採得檢體98件，包括魚類59件及貝類39件。檢體送至本局進行分析，檢測方法是將檢體均質化後，取25g，進行皂化、萃取及濃縮，再以硫酸及酸性矽膠管柱進行淨化，最後檢液以GC/ECD進行分析。本研究採用多重分析方法檢測23種多氯聯苯同源物，方法之最低檢出限量為2~6ng/g，平均回收率介於92.8%~94.7%。結果魚類檢體中，檢出多氯聯苯同源物2件，含量分別為104ng/g及166ng/g；貝類檢體中，檢出多氯聯苯同源物7件，含量範圍為26ng/g~140ng/g。檢出之多氯聯苯同源物中以五氯取代及六氯取代的多氯聯苯為主。D98件檢體檢驗結果均與衛生標準規定相符。
並列摘要
A survey of PCB residues in fish and shellfish in Taiwan is reported for understanding the PCB residues. Ninety-eight samples including seven species of fish (59 samples) and five species of shellfish (39 samples) were sampled from aquaculture ponds or purchased from retail outlets and analyzed by GC/ECD method. Twenty-five grams of homogenized fish flesh and shellfish were saponificated, extracted by n-hexane, concentrated, and cleaned up by sulfuric acid, followed by acid silica column. Twenty three polychlorinated biphenyl (PCB) congeners were analyzed in this study. Recovery studies were carried out by spiking PCB congeners at the levels of 30 ng, 50 ng and 75 ng/g (wet wt). Average recoveries were in the range of 92.8%~94.7%. The method detection limits were 2 ng/g~6 ng/g for various PCB congeners. While the fish and shellfish samples were analyzed by this method, the result showed two samples of Grouper were detected to contain 104 ng/g and 166 ng/g PCB congeners. Seven samples of Oyster and Purple clam were detected to contain PCB congeners ranged from 26 ng/g to 140 ng/g. In this study, the penta- and hexachlorinated PCBs were the major congeners found in the fish and shellfish samples.