2015年7月1日，美国环境保护署（EPA）发布消息，修订豁免在肉、奶、家禽、蛋、鱼、贝类产品内部或表面的铜残留限量，并且在使用嵌入氧化亚铜聚合物发射头的灌溉系统灌溉农作物时，豁免氧化亚铜残留限量要求。本条例免除了制定氧化亚铜最大许可残留限量的需要，自2015年7月1日起生效。 更多详情参见：https://www.federalregister.gov/articles/2015/07/01/2015-16224/cuprous-oxide-exemption-from-the-requirement-of-a-tolerance |
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