高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (5): 699.

• 论文 • 上一篇    下一篇

以PMBP为化学改进剂的电热蒸发/ICP-AES测定痕量钪的研究

彭天右, 江祖成   

  1. 武汉大学化学系, 武汉, 430072
  • 收稿日期:1997-06-13 出版日期:1998-05-24 发布日期:1998-05-24
  • 通讯作者: 江祖成
  • 作者简介:彭天右,男,28岁,博士研究生.
  • 基金资助:

    国家自然科学基金;国家教委博士点基金

Determination of Scandium in ETV-ICP-AES by Using PMBP as Chemical Modifier

PENG Tian-You, JIANG Zu-Cheng    

  1. Department of Chemistry, Wuhan University, Wuhan, 430072
  • Received:1997-06-13 Online:1998-05-24 Published:1998-05-24

PDF (PC)

被引次数

6

摘要： 报道了以1-苯基-3-甲基-4-苯甲酰基-吡唑酮[5](PMBP)为化学改进剂的ETV-ICP-AES测定痕量钪的新方法.详细研究了金属螯合物在石墨炉内的形成、挥发及其影响因素;发现过量PMBP的存在有利于该螯合物的形成,并定量蒸发/传输至等离子体中.在优化的实验条件下,钪的检出限为0.3ng/mL,相对标准偏差为2.4%(c=0.1μg/mL,n=7).本法已用于标准参考物机动车尾气尘粒中钪的测定,获得了满意的结果.

关键词: 电感耦合等离子体原子发射光谱, 低温电热蒸发, 钪/PMBP螯合物, 钪

Abstract: A novel method for the introduction of scandium(Sc), based on the low-temperature volatilization of 1-phenyl-3-methyl-4-benzoyl pyrazolonate(PMBP) chelate from graphite furnace, was reported for electrothermal vaporization(ETV)/ICP-AES. The formation and volatilization of Sc/PMBPchelate in the furnace as well as its affecting factors were investigated in detail. It was found that the existence of extra PMBP was favourable to form the Sc/PMBP chelate and vaporizes/transports quantitatively into ICP. Under optimized conditions, the detection limit was determined to be 0.3 ng/mL. The relative standard deviation (RSD) for 1 ng of scandium was 2.4%(c=0.1 μg/mL, n=7). The scandium content in the standard material vehicle exhaust particulates determined by the proposed method were in good agreement with the reference values.

Key words: ICP-AES, Low-temperature electrothermal vaporization, Scandium/PMBP chelate, Scandium

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