Citation: FU Liang, SHI Shu-Yun, MA Jun-Cai. Accurate Determination of Harmful and Doping Elements in Soft Magnetic Ferrite Powders Using Inductively Coupled Plasma Tandem Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(9): 1382-1389. doi: 10.19756/j.issn.0253-3820.191232 shu

Accurate Determination of Harmful and Doping Elements in Soft Magnetic Ferrite Powders Using Inductively Coupled Plasma Tandem Mass Spectrometry

FU Liang ^1,2, ,
SHI Shu-Yun ² ,
MA Jun-Cai ³

1.
Collaborative Innovation Center of Green Development for Wuling Mountain Areas, Yangtze Normal University, Fuling 408100, China;
2.
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
3.
Chongqing Shangjia Electronics Co., Ltd., Fuling 408100, China

Received Date: 25 April 2019
Revised Date: 30 May 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (No.21275163) and the Technology Innovation and Application Demonstration of Chongqing Municipal Science and Technology Commission (No.cstc2018jscx-msyb0675).

A new strategy for eliminating mass spectral interference in analysis of soft magnetic ferrite powders by inductively coupled plasma tandem mass spectrometry (ICP-MS/MS) in the MS/MS mode using mixed reaction gases was proposed. The mixture of nitric acid and hydrochloric acid was used for digesting the samples by a microwave-based digestion system. The contents of harmful elements (Na and Mg) and doping elements (Al, K, Ti and Co) in the digestion solution were determined by ICP-MS/MS. For interferences of mass spectrum in the complex matrix composition of different soft magnetic ferrite powders, in the MS/MS mode, the interferences were eliminated using mixed reaction gases of NH₃/He/H₂ through mass shift and on-mass methods. The limits of detection for Na, Mg, Al, K, Ti and Co were 17, 3.1, 5.4, 11, 0.64 and 0.53 ng/L, respectively. The developed method was evaluated by sector field ICP-MS (SF-ICP-MS), and there was no significant difference between the two analytical methods at a 95% confidence level, indicating that the developed method was accurate and reliable. This method was demonstrated simple and quick, and could be used in interference-free determination of Na, Mg, Al, K, Ti and Co in soft magnetic ferrite powders, which provided a new technical means for quality control of harmful and doping elements in soft magnetic ferrite powders.
- Soft magnetic ferrite powder,
- Inductively coupled plasma tandem mass spectrometry,
- Harmful element,
- Doping element,
- Mixed reaction gases
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