Determination of ansenic, antimony, bismuth, tin, nickel, lead, indium, silver, lanthanum, cerium, gadolinium and yttrium in waste printed circuit boards by inductively coupled plasma atomic emission spectrometry
LIU Ying1, 2, LI Hua-chang*2, FENG Xian-jin2
1. College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin 541004, China; 2. Sub-Institute of Analytical Chemistry, Beijing General Research Institute of Mining and Metallurgy, Beijing 102628, China
Abstract：The elements including As, Sb, Bi, Sn, Ni, Pb, In, Ag, La, Ce, Gd and Y in waste printed circuit boards were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) with the samples dissolved by mixed acid of HNO3-HCl. The dosage of HNO3-HCl, the analytical spectrum lines, matrix effect and instrument parameters were studied to determine the optimal working conditions. The reliability and accuracy of this method were confirmed by standard addition recovery test and with reference to the comparison analysis with inductively coupled plasma mass spectrometry (ICP-MS).The results showed that the proposed method can be used for the accurate determination of As, Sb, Bi, Sn, Ni, Pb, In, Ag, La, Ce, Gd and Y in waste printed circuit boards. The detection limits (3s) for each element were 0.000 9-0.04 μg/mL, while the relative standard deviations for the determination of samples (n=5) and the recoveries were in the range of 0.58%-4.6% and 85%-104%, respectively.
