title: [Determination of Sb and Bi in 24 international geological reference materials by using pressurized acid digestion-ICP-MS].
abstract: The authors studied in detail the memory effect of Bi, Sb, As and Te in ICP-MS. The produced memory effects of these element were in the order of Bi>Sb>Te>As. Bi was seriously adsorbed by the polypropylene sample storing bottle and the sample introduction system in the low nitric acid medium (0.01%-1% HNO3). The washout effect of 0.1% HF was found to be better than those of 6% HNO3 and 0.1% HClO4. Under the given experiment conditions, the instrumental limit of detection was 0.001 and 0.0001 ng x mL(-1) for Sb and Bi, respectively. The authors report the determination of Sb and Bi in 24 international geological reference materials by using pressurized acid digestion-ICP-MS (including AGV-2, BHVO-2, BCR-2, etc.). Most of the results were found to be in reasonable agreement with the reported values in the literature. The authors' determined values of Sb for GSR-1 (granite; 0.30 microg x g(-1)) and JP-1 (peridotite; 0.045 microg x g(-1)) are obviously higher than those reported values. This is attributed to the efficient pressurized acid digestion, which is generally much more efficient than conventional wet digestions for insoluble minerals.
authors.affiliation: State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China. zchu@vip.sina.com
authors.forename: Zhao-chu
authors.initials: ZC
authors.lastname: Hu
authors.forename: Shan
authors.initials: S
authors.lastname: Gao
authors.forename: Xiao-ming
authors.initials: XM
authors.lastname: Liu
authors.forename: Hong-lin
authors.initials: HL
authors.lastname: Yuan
authors.forename: Ye
authors.initials: Y
authors.lastname: Liu
authors.forename: Chun-rong
authors.initials: CR
authors.lastname: Diwu