1999年 5月 ,在对某冷饮厂生产的果味雪糕例行监测时 ,发现不同生产日期的两份检品铅含量分别超标 8.3倍和 19.7倍 (标准为 0 .3mg/ kg) ,调查超标原因 ,其配料均为食品级 ,排除了原料的铅污染 ,但在现场发现 ,配料容器、原料液储存罐 ,消毒设备及运行管道均是不锈钢材料制品 , In May 1999, during routine monitoring of fruity ice cream produced in a cold drinks factory, it was found that the lead content of two seized goods at different production dates exceeded 8.3 times and 19.7 times respectively (the standard was 0.3 mg / kg), and the investigation exceeded the standard Reason, the ingredients are food-grade, ruled out the lead pollution of raw materials, but found on the scene, ingredients containers, raw material storage tanks, disinfection equipment and running pipes are stainless steel products,