电感耦合等离子体发射光谱法测定记号笔笔芯和墨水中铜和铬

Determination of Copper and Chromium in the Cartridges of Permanent Marker Pen and Ink by ICP-AES

报道了使用ICP-AES测定记号笔芯和墨水中的铜和铬的方法。主要关注了不同的样品前处理方法的研究。结果表明:对标记用的油性记号笔笔芯和含有高分子树脂的墨水,采用550℃灰化,混合酸(VHNO3∶VHClO4=3∶1)溶解的方法处理样品,是该类样品比较好的处理方法;而对不含有高分子树脂的墨水,采用直接用混合酸(VHNO3∶VHClO4=3∶1)的消解即可。消解后的样品经稀酸酸化后,采用ICP-AES测定铜和铬,结果准确、稳定。该方法适合记号笔或墨水中元素的测定。

The method for the determination of copper and chromium in the cartridges of permanent pen oil base and ink by ICPAES was reported. This mainly concerned the different methods for pretreatment of samples. The study indicated that the better method for the pretreatment of the cartridges of permanent pen and the ink containing resin is dry ashing at 550 ＂C followed by wet-decomposition with mixed acid （VHNO3： VHClO4 = 3 ： 1） ; the better method for the pretreatment of water soluble ink is hydrodigestion with mixed acid （VHNO3： VHClO4 = 3 ： 1）. After suitable dilution with acid, copper and chromium were determinated by ICP-AES. It was shown that the method is reliable for the test of precision and accuracy. RSD and recovery were in the range of 5. 9%-7.9% and 90%-104%, respectively.