氨气配位-电感耦合等离子体串联质谱法在镍基高温合金痕量元素检测中的应用

Application of Trace Elements Detection in Nickel-based Superalloys Based on Ammonia Coordination and Inductively Coupled Plasma Tandem Mass Spectrometry

  • 摘要: 基于NH3配位的价键理论,建立电感耦合等离子体串联质谱法应用于镍基高温合金多种痕量元素的检测。以Zn元素为例,选择NH3作为反应气,Zn与NH3发生配位反应,仅产物离子Zn(NH3)x被检测,进而达到消除多原子离子干扰的目的。经确定离子产物、优化气流速和抑制参数,痕量Zn的检出限低至0.13 μg/g,相对标准偏差为4.2%~5.1%,加标回收率为93.0%~103%。该方法具有检出限低、灵敏度高、准确度高的优点,有望扩展应用于镍基高温合金中Ag、Cu、V、Fe等多种痕量元素的测定。

     

    Abstract: The detection method of various trace elements in nickel-based superalloys is developed based on the valence theory of NH3 coordination. Zn is taken as an example. With NH3 as the reaction gas, Zn reacts with NH3, and the product ion Zn(NH3)x can only be detected, which can eliminates the multi-atomic ion interference. Through determining the ion product and optimizing the velocity of the air flow and rejection parameter, the detection limit of Zn is as low as 0.13 μg/g with the standard deviation of 4.2%-5.1%, and the recovery rate is 93.0%-103.0%. The method processes low detection limit, high sensitivity, and high accuracy, and is hopeful to be applied to the detection of various trace elements (such as Ag, Cu, V, and Fe) in nickel-based superalloys.

     

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