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食品安全关是怎么把的

2017-08-31 06:26:51   中国青年网

食品检验的理化指标分析、有毒有害物质含量检验,需要借助物理、化学的分析方法,使用某种测量工具或仪器设备完成。一个样品分析的过程,包括样品的采集、分析前的样品处理、化学分析、仪器分析、数据处理及结果报告。“测白酒中的甲醇时,取一定量的样品,同时做平行样品,按标准规定加入叔戊醇标准溶液,混匀,上气相色谱仪测定,30分钟后得出检验数据,如果粮谷类为原料生产的酒检验结果甲醇含量超过0.6g/L,或其他原料生产的酒检验结果甲醇含量超过2.0g/L,则判定为不合格。”研究院气相室负责人、高级工程师赵娅鸿示范了白酒中甲醇检验过程。

高科技扮演关键角色

“随着科学技术的迅速发展,食品检验技术已能达到百万分之一甚至十亿分之一的准确度。”梁宝爱解释,分析化学的发展为食品安全检验提供了准确可靠的分析方法。此外,食品行业开发出许多自动化程度和精密度都很高的检验仪器,仪器分析方法也已成为食品检验的主要手段,包括原子荧光光谱法、等离子体光谱质谱法、气相色谱法、高效液相色谱法等。

“我们还采取了多项检验方法,确保每一份检验结果的准确性。”梁宝爱介绍,主要的质量控制方法有5个:一是一个检验员检验完之后,让另一个检验员再进行检验比对,看是否一致,这是人员比对检验;二是用不同仪器进行检验验证;三是加入已知的国家标准物质进行验证;四是留样再测检验,也就是用首次检验时的同批次样品,重新编号再发给同一个人进行二次检验,看前后两次检验结果是否一致;五是实验室比对,也就是送到其他外部有资质的实验室进行比对。“现在凡是抽检检出不合格样品,采取的措施就是用前4种方法进行内部比对之后,送到其他实验室再比对,确保检验结果的准确性。”

2016年,省食检院承担抽检任务,对食品生产经营单位抽检4195批次,检出不合格食品220批次,问题发现率4.6%,上报抽检信息25期。省食药监局按规定对不合格食品进行下架封存、召回、立案、罚款,有效控制了食品安全风险,有力震慑了违法违规行为。

省食检院专家提醒消费者,在选购、存储和加工制作食品时应注意通过正规可靠渠道购买,看清外包装标签标识中的食品生产单位和产品相关信息。购买后按照标签所示方式保存,不要超过保质期限。食品加工制作时,应注意清洁卫生,加热烹制过程要做到烧熟煮透,凉菜现做现吃。

本报记者 秦洋 实习生 牛艳蓉

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