Guo Yuzhu, Siu K W Michael, Baranov Vladimir I
Department of Chemistry and Centre for Research in Mass Spectrometry, York University, Toronto, Ontario, Canada.
J Am Soc Mass Spectrom. 2005 Jun;16(6):957-66. doi: 10.1016/j.jasms.2005.03.010. Epub 2005 Apr 15.
A high-pressure 20-segment quadrupole collision cell (HP-SQCC), which replaces a collision cell in a modified triple-quadrupole mass spectrometer is investigated in this work as an ion-molecule reactor with an inherent heat source. The highest working pressure achievable is 20 mTorr. The 20 quadrupole segments permit superimposition of linear axial electric field over the conventional quadrupole field in the radial direction. The axial and radial fields are employed to control ion temperature. Heat is transferred to the reactants through ion frictional heating. The HP-SQCC utilizes a combination of several physicochemical phenomena and an attempt is made to examine a range of ion-molecule reactions. Due to a sufficiently large number of reactive collisions, the reactor is used to promote sequential exothermic ion-molecule reactions. To characterize the performance of the HP-SQCC, the various ion-molecule reactions between the fragment ions of ferrocene (Cp(2)Fe), cobaltocene (Cp(2)Co) and nitrogen, oxygen, water and carbon monoxide are investigated.
本文研究了一种高压20段四极杆碰撞池（HP-SQCC），它取代了改良型三重四极杆质谱仪中的碰撞池，作为一种具有内在热源的离子-分子反应器。可实现的最高工作压力为20毫托。这20个四极杆段允许在径向方向上的传统四极场之上叠加线性轴向电场。轴向和径向场用于控制离子温度。热量通过离子摩擦加热传递给反应物。HP-SQCC利用了多种物理化学现象的组合，并尝试研究一系列离子-分子反应。由于存在足够多的反应性碰撞，该反应器用于促进连续的放热离子-分子反应。为了表征HP-SQCC的性能，研究了二茂铁（Cp(2)Fe）、二茂钴（Cp(2)Co）的碎片离子与氮气、氧气、水和一氧化碳之间的各种离子-分子反应。
