包装卡纸中重金属离子含量研究

采用火焰原子吸收光谱法,测定了9 家相同定量的包装卡纸中重金属离子的含量,通过能谱分析和显微镜观察,分析了重金属离子含量较高的原因。结果表明,只有2 家卡纸未检测出重金属离子,7 家卡纸都不同程度地含有重金属离子,其中有2 家重金属离子含量超出了欧盟标准的最高限。分析可知造纸原料本身和造纸助剂是造成重金属离子含量较高的主要原因,并提出了控制卡纸中重金属离子含量的造纸工艺要求。

Heavy Metal Ions Content in Packaging Paperboard

Flame atomic absorption spectrometry (FAAS) was applied to determine the content of heavy metal ions of packaging paperboards of nine producers. The causes of higher heavy metal ions content was analyzed by energy dispersive spectrometer analysis and microscope observation. The result showed that only paperboards from two producers do not detect heavy metal ions; paperboards from the other seven producers differently contain heavy metals ions, in which product of two producers have heavy metal ions content beyond the top limit of European Union standards. Papermaking raw material itself and the additives are the main causes of higher heavy metal ions content. The process requirements in papermaking was put forward to control the heavy metal ions content.