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等离子体发射光谱仪测定钛铁矿中钛含量 被引量:4
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作者 沈春春 《化工时刊》 CAS 2016年第4期30-32,共3页
本文研究地矿样品经四酸分解法前处理,盐酸酸化后,在酸性介质中直接用电感耦合等离子体发射光谱仪测定测定矿样中的钛含量,实验结果表明,该法简便快捷,分析灵敏度高,精密度好,结果可靠,能满足分析要求。
关键词 电感耦合等离子体发射光谱仪 四酸分解 灵敏度
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ICP-AES测定磷矿石中多种元素的3种前处理方法比较 被引量:6
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作者 袁彤 左勇 +2 位作者 赵丽君 王培 邓杰 《农业科技与装备》 2013年第2期13-15,共3页
以王水分解、四酸分解和偏硼酸锂熔融这3种前处理方法,分别对国家标准物质GBW07210、GBW07211、GBW07212中磷、钙、镁、铁、铝、钾、钠、硅8种元素进行测定,研究不同前处理方法对分析测定结果的影响。
关键词 磷矿石 王水分解 四酸分解 偏硼锂熔融 ICP—AES 前处理
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Cation and anion substitution effects on the ultrafast dynamics of interionic interaction in imidazolium based ionic liquids
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作者 LU Rong WANG Wei YU AnChi 《Science China Chemistry》 SCIE EI CAS 2011年第9期1491-1497,共7页
Room-temperature Ionic Liquids(ILs) have numerous unique properties that differ from those of conventional molecular solvents.Although the unique properties of ILs have been suggested to origin from their microscopic ... Room-temperature Ionic Liquids(ILs) have numerous unique properties that differ from those of conventional molecular solvents.Although the unique properties of ILs have been suggested to origin from their microscopic interionic interaction,detailed dynamics of interionic interaction of ILs has not been fully understood.Here,with the Femtosecond Optical Heterodyne-Detected Raman Induced Kerr Effect Spectroscopy(fs-OHD-RIKES),we measured the ultrafast dynamics of the interionic interaction of three typical imidazolium based ILs,1-butyl-3-methylimidazolium tetrafluoroborate([bmim][BF4]),1-butyl-3-methylimidazolium hexafluorophosphate([bmim][PF6]),and 1-decyl-3-methylimidazolium tetrafluoroborate([dmim][BF4]).We observed several periods of subpicosecond oscillation in their fs-OHD-RIKES signals.Through decomposing their fs-OHD-RIKES signals into four Brownian oscillators in time domain,we explored the cation and anion substitution effects on the ultrafast dynamics of interionic interaction of ILs.We found that the cation substitution affected all the low frequency motions we observed,while the anion substitution only affected the two higher low frequency motions. 展开更多
关键词 Brownian oscillator ultrafast dynamics interionic interaction ionic liquid Raman induced Kerr effect spectroscopy
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