Determination of trace elements in high-purity quartz samples by ICP-OES and ICP-MS: A normal-pressure digestion pretreatment method for eliminating unfavorable substrate Si
作者: Xuelin DongYuxiang XiongNan WangZhou SongJie YangXiumei QiuLihua Zhu
作者单位: 1Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China
2Key Laboratory of Rare Mineral, Ministry of Land and Resources, Geological Experimental Testing Center of Hubei Province, Wuhan, 430034, PR China
刊名: Analytica Chimica Acta, 2020, Vol.1110 , pp.11-18
来源数据库: Elsevier Journal
DOI: 10.1016/j.aca.2020.03.006
关键词: DigestionSiO 2 matrix eliminationAmmonium difluorideTrace elements analysisMass spectrometry
英文摘要: Abstract(#br)The analysis of siliceous matrix samples may adopt a two-step pretreatment, which includes melting with ammonium hydrogen fluoride and redissolving with nitric acid. However, the residual of substrate silicon unfavorable to the determination of trace elements in the samples due to serious matrix effects. Here, a new digestion method using simultaneously both ammonium bifluoride and nitric acid under normal pressure was developed for high-purity quartz sand sample. The digestion pretreatment is a two step process: melting/dissolving with both ammonium bifluoride and nitric acid at 200 °C for 2 h, and evaporating the solution at 250 °C to dryness. As confirmed by XRD analysis, silicates in the sample were converted to (NH 4 ) 3 SiF 6 NO 3 in the melting/dissolving step. TGA...
全文获取路径: Elsevier  (合作)
影响因子:4.387 (2012)

  • eliminating 消除排除的
  • elements 初步
  • method 方法
  • unfavorable 不利
  • pretreatment 预处理
  • substrate 基质
  • quartz 石英
  • purity 纯度
  • trace 痕迹
  • digestion 消化