[Determination of trace elements in electrical absorption prospecting polyform sample by inductively coupled plasma mass spectrometry].
An ICP-MS method was established for the determination of sixteen trace elements, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Nb, Mo, Ag, Cd, Au, Tl, Pb and Bi in electrical absorption prospecting polyform. Three methods for polyform samples (ashing method, extraction by HNO3 + H2O2 and digestion with aqua regia) were compared and the results showed that the second method is the best one. The best operational paramenters of X series ICP-MS were confirmed, the inner standard 103Rh and 185Re were selected for the determination of elements, and analysis of isotopes interference correction equations was established. Satisfactory linearity of working curves of the sixteen trace elements was obtained, giving all their correlation coefficients over 0.999 8. The determination limit of the analytes was in the range of 0.001-2.2 microg x g(-1). The precision was 1.39%-4.84%, and the recoveries were between 94.86% and 105.2%. The method is sensitive, quick and simple and has been applied to the analysis of a great number of polyform samples.
Shi
Yi-Hua
YH
Guilin Research Institute of Geology for Mineral Resources, Guilin 541004, China. syhua2000@163.com
Yang
Zhong-Ping
ZP
Huang
Jian-Hui
JH
Zhou
Qi-Ming
QM
Xiong
Chuan-Xin
CX