期刊
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
卷 26, 期 3, 页码 586-592出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0ja00203h
关键词
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资金
- National Science Council of the Republic of China [NSC 97-2113-M-110-008-MY3]
The determination of B, Al, P, Fe, Ni, Cu, Zn, Cd and Pb in silicon powder by ultrasonic slurry sampling electrothermal vaporization inductively coupled plasma mass spectrometry (USS-ETV-ICP-MS) using citric acid as the modifier was investigated. The influences of instrument operating conditions and slurry preparation on the ion signals were studied. A relatively low vaporization temperature of 1900 degrees C was used, which separated the analyte from the major matrix components that not only improved ion signals significantly but also alleviated the spectral interferences caused by (SiSi+)-Si-28-Si-29, (SiOO+)-Si-28-O-16-O-16, (SiOO+)-Si-28-O-17-O-18 and (ArSi+)-Ar-38-Si-28 on Fe-57(+), Ni-60(+), Cu-63(+) and Zn-66(+) determinations. The method has been applied to determine B, Al, P, Fe, Ni, Cu, Zn, Cd and Pb in a 99.999% pure silicon powder sample and four solar grade silicon powder samples using standard addition calibration methods. The concentrations that are in mg g(-1) to sub mg g(-1) levels were in good agreement with those of digested samples analyzed by pneumatic nebulization membrane desolvation ICP-MS. The precision between sample replicates was better than 9% with USS-ETV-ICP-MS technique. The method detection limit estimated from standard addition curves was about 8, 7, 9, 50, 9, 3, 7, 1 and 0.4 ng g(-1) for B, Al, P, Fe, Ni, Cu, Zn, Cd and Pb, respectively, in original silicon samples.
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