精品文献
青岛pvc塑料包装袋
复合塑料包装袋中重金属迁移量的测定
复合塑料包装袋中重金属迁移量的测定
将复合塑料袋用4%乙酸浸泡,采用石墨炉原子吸收光谱仪对其中的铅、镉、铬、镍、铜、砷迁移量进行了测定。结果表明:各元素的吸光度与质量浓度呈良好的线性关系,相关系数为0.9989～0.9999,元素Pb、Cd、Cr、Ni、Cu、As的检出限分别为1.04、0.05、0.98、1.00、0.97、0.96μg/L,各元素测定结果的相对标准偏差在1.03%～6.81%之间(n=6),样品的加标回收率为95.11%～104.52%。
PVC塑料包装中化学物总迁移的研究
PVC塑料包装中化学物总迁移的研究
This paper compared the overall migration of chemicals from PVC film into different food simulants,investigated the change tendency of migration with the time and temperature changed.Migration of chemicals from PVC film into the water food simulants is probably 20mg/dm2and the migration of chemicals from PVC film into the fatty food simulants(Iso-octane)is probably 100mg/dm2.Migration of chemicals from PVC into food simulants become more and more with the extension of time and the increase of temperature until the balanced of migration.