Development of Microwave Plasma Torch Mass Quadrupole Spectrometer

作者：Xu Hua-Lei; Ling Xing; Zhang Xiao-Hua; Jiang Tao; Zhu Zhi-Qiang; Qiu Chun-Ling; Tian Di^*

来源：Chinese Journal of Analytical Chemistry, 2015, 43(12): 1955-1961.

• Microwave plasma torch
• Quadrupole mass spectrometer
• Metal detection
• Ion funnel
• Collision induced dissociation

A novel quadrupole mass spectrometer using microwave plasma torch as the ionization source was developed (MPT-QMS) for the analysis of trace metal elements in water samples. The influence of ion funnel on instrument performance and analytical outputs was studied and illustrated. The results showed that it could lead to effective collision induced dissociation (CID) by modulating the RF voltage of the ion funnel, which quantitatively broke polyatomic ions produced by MPT into mono-atomic ions. Such effect significantly reduced the complexity of the mass spectrum caused by multi-atom ions. In contrast to a linear ion trap mass spectrometer (LTQ) without ion funnel, the result of MPT-QMS was easier to be identified. A mixed sample containing 20 metal elements was detected by this instrument, the detection limits of most elements were between 0.02 and 1.4 ng/mL. Compared to ICP-MS, MPT-QMS was only 10% of power and gas consumption, and was suitable for the analysis of water samples when carried by a vehicle.

• 出版日期2015-12
• 单位吉林大学; 东华理工大学