Quadrupole Ion Trap/FTICR Tandem Mass Spectrometer

描述（由申请人提供）：本提案的目的是开发一种新型串联质谱（或MS/MS）技术，用于生物分子的质量和结构分析，该技术可将四极离子阱（QIT）的出色离子分离和碎裂能力与傅立叶变换（FT）离子回旋共振（ICR）质谱（MS）的高分辨率和质量准确度相结合。该技术的主要特点是使用永磁体在拟议仪器的ICR部分中产生磁场，这将使其具有成本效益，尺寸紧凑，并且适用于许多应用。主要强调的是在最大空间体积中产生均匀磁场，其在一定程度上可以补偿由ICR电池中的永磁体产生的较低磁场的使用所施加的限制（与永磁体产生的7-12特斯拉相比，约0.6特斯拉）。一个新的永磁体的设计建议，以实现这一目标。新仪器预计将具有商业QIT-MS系统的尺寸，成本和MS/MS功能，以及超过流行的混合四极杆/飞行时间（QqTOF）MS的分辨率和质量精度。

DESCRIPTION (provided by applicant): The purpose of this proposal is to develop a novel tandem mass spectrometry (or MS/MS) technology for mass and structural analysis of biomolecules that could combine excellent ion isolation and fragmentation capabilities of a quadrupole ion trap (QIT) and high resolution and mass accuracy of Fourier transform (FT) ion cyclotron resonance (ICR) mass spectrometry (MS). The main feature of this technology is the use of a permanent magnet for generation of magnetic field in ICR part of the proposed instrument that will make it cost-efficient, compact in size, and affordable for many applications. The major emphasis is made on producing a homogeneous magnetic field in a maximum space volume that to a certain extent can compensate limitations imposed by the use of a lower magnetic field generated by a permanent magnet in the ICR cell (about 0.6 Tesla compared to 7-12 Tesla generated by superconductive magnets). A new permanent magnet design is suggested to achieve this goal. The new instrument is expected to have size, cost and MS/MS capabilities of commercial QIT-MS systems and the resolving power and mass accuracy exceeding that of a popular hybrid quadrupole/time-of-flight (QqTOF) MS.