[Determination of copper and chromium in the cartridges of permanent marker pen and ink by ICP-AES].
The method for the determination of copper and chromium in the cartridges of permanent pen oil base and ink by ICP-AES 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 degrees C followed by wet-decomposition with mixed acid (V(HNO3) : V(HClO4 = 3 : 1); the better method for the pretreatment of water soluble ink is hydrodigestion with mixed acid (V(HNO3 : V(HClO4 = 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.
Duan
Xu-Chuan
XC
College of Chemistry and Life Science, Tianjin Normal University, Tianjin 300074, China.