北京市食物中硒及其拮抗元素的含量

本文测定了北京市普通食物中硒的含量。结果证实水产品、动物脏器特别是肾脏、蛋类和蘑菇中硒含量最丰富;进口谷类和豆类显著高于国产;除大蒜和蘑菇硒含量比较高外,大多数蔬菜和果品中硒含量都低于0.010ppm;母乳硒含量较其它市售乳制品和代乳品为高。北京市食物中硒含量远高于克山病区。所测定的食物中,除个别水产食品外,汞、砷及镉的含量大都低于国家允许标准。天然植物性食物中硒含量和蛋白质含量呈非常显著的正相关(r=0.844,P<0.001)。

SELENIUM AND ASSOCIATED ANTAGONISTIC ELEMENTS CONTENT OF COMMON FOODS IN BEIJING MARKET

The content of selenium and several antagonistic metals such as mercury, arsenic, and cadmium in foods from Beijing market has been determined. Results showed that marine products, Viscera (particularly kidney), eggs, and mushroom were good dietary sources of selenium. The selenium contents of imported cereals and pulse are much higher than those grown in China as far as the sample analysed. Most vegetables and fruits contained selenium below a level of 0.010ppm with exception of garlic and mushroom.The selenium content of human milk was higher than other kinds of milk, milk products and milk-substitutes. Selenium content of Beijing foods was far higher than those in affected area of Keshan disease. The mercury, arsenic, and cadmium content of foods was below the National Allowance Standard except a few marine products.The selenium content of natural plant foods was positively correlated with its protein content (r=0.844, p<0.001).A wide variety of foods in Beijing market were sampled for analysis and the data obtained wpuld serve as a guide for people to select selenium-rich foods.