随着人们生活水平的提高,食品安全问题日益受到广大百姓和各级政府的关注。笔者于2005年至2007年在廊坊市大型超市及廊坊市最大的农产品批发市场抽检包括粮食及其制品、肉类及其制品等23种食品,其中面粉(n=10)、面包(n=10)、馒 With the improvement of people’s living standards, the issue of food safety has drawn increasing attention from the general public and governments at all levels. From 2005 to 2007, the author sampled 23 kinds of foods such as grain and its products, meat and their products in large supermarkets in Langfang City and the largest agricultural product wholesale market in Langfang City, including flour (n = 10), bread (n = 10 ),steamed bread