臺灣地區養殖草蝦蝦肉重金屬污染調查

SURVEY ON THE CONTENTS OF LEAD, COPPER, CADMIUM AND MERCURY IN GRASS SHRIMP MEAT IN HATCHERIES OF TAIWAN AREA

於民國73年11月至74年7月在全省草蝦養殖量較高的十三縣市養殖場抽購檢體115件，利用原子吸光光譜儀分析草蝦可食部分鉛、銅、鎘、汞等重金屬的含量。以縣市為別，草蝦肉中鉛平均含量最高者為宜蘭縣的1.153ppm，平均含量最高者為桃園縣的9.207ppm，平均含量最高者為台南縣0.524ppm，平均含量最高者為嘉義縣的0.088ppm。經雙方分析額示各縣市間草蝦肉鉛、鎘、汞的含量均有顯著差異（p<0.05），但銅的含量則無顯著差異（p＞0.05），在全部檢體中鉛、鎘、銅、汞等四種重金屬的總平均含量分別為0.705ppm、0.209ppm、6.638ppm、0.049ppm；的含量遠低於衛生署公告魚蝦類衛生標準0.5ppm以下，而鉛、銅、鎘的衛生標準尚未訂定。 115 samples of grass shrimp were collected from thirteen counties or cities which had higher production amount of grass shrimp from November 1984 to July 1985. Contents of lead, copper, cadmium and mercury in edible portion of grass shrimp were analyzed by atomic absorption spectrophotometry. Classified to 13 locations, the highest lead content of grass shrimp meat was 1.153 ppm on the average in Ilan Hsien. The highest mean copper content was 9.207 ppm in Taoyuan Hsien. The highest mean cadmium content was 0.524 ppm in Tainan Hsien, and the highest mercury content was 0.088 ppm on the average in Chiayi Hsien. According to the analysis of variance, the contents of lead, cadmium and mercury were significantly different (p<0.05) among 13 locations. There was no significant difference (p> 0.05) among 13 locations in copper content. The overall mean contents of lead, copper, cadmium and mercury in 115 samples were 0.705 ppm; 6.638 ppm; 0.209 ppm; 0.049 ppm, respectively. The mean content of mercury was far below the allowed limit of mercury content in fish and shellfish, 0.5 ppm. The allowed limits of copper, lead and cadmium content have not been determined yet. This result can provide reference for Health Administrations to determine the allowed limit content.