Clusters and nanoparticles can be generated from a variety of sources, such as electrospray ionisation, laser evaporation and magnetron sputtering and at pressures from sub-millibar to atmospheric. The quadrupole mass filter plays a key role in the transport and mass selection of these ions, as it possesses sufficient mass resolution and a 100% duty cycle. The production of size-selected clusters is used for two main applications, cluster deposition and spectroscopy.
For special applications, such as removal of neutrals and photons in spectroscopy prior to characterisation in an ion trap with x-rays, high transmission ion redirection components are required. For these cases, Hiden Analytical offers customized Beam Deflectors & Transfer Quadrupoles with up to 20 mm rod diameter (DLS-20).
Cluster Analysis with Hiden Analytical
The upper mass limit of a Quadrupole filter is severely constrained by the demand for RF Power that accompanies increasing m/z. Down-sizing the Rod Diameter appears to offer a way around this problem, but comes with a significant reduction in Quad performance, limiting its effectiveness for clusters at high m/z. Hiden’s High Power RF Generator provides the solution – it is capable of delivering 5,000 m/z mass range even on a 9 mm Triple Filter Quad and with a frequency of 0.8 MHz, a combination that generates outstanding performance. This brings transmission of 45% at 5,000 m/z, yielding the lowest
detection limit even for the largest of clusters. Hiden’s unique combination of Triple Filter, 9 mm Rods and High Frequency RF Generator, creates exceptional resolving power, even at the highest m/z.
To see the systems used in this field, please visit the link below:
Quadrupoles and Components for Cluster Analysis, Nanoscale Particles