Shimadzu- High-End Gas Chromatograph-Mass Spectrometer(Model:GCMS-QP2010 Ultra)

The effect of filament potential on the ion source is reduced by placing more distance between the filament and ion source box, and installing a shield plate. The result is that generated ions are transported more efficiently to the MS. In addition, filament shielding protects thermally labile compounds.
(patent pending)

The installation of an overdrive lens, in front of the electron multiplier, has reduced the random noise that occurs with ion transmission, improving the S/N ratio. Through the application of a voltage to the lens, the noise component in the vicinity of the lens is reduced, and the effect of focusing ions from the mass filter improves the S/N ratio. (Patent: US6737644)

The relatively slow scan speeds of conventional GC-MS systems have proven to be a limiting factor when adapting the techniques of "Fast GC" or comprehensive GCxGC to the GC-MS platform. Data acquisition speeds of 30Hz or less and 10,000 u/sec are too slow to provide enough points across an ultra-sharp fast GC or GCxGC peak for reliable quantitation. New technology in mass spectrometry has been developed which allows us to increase the scan speed of our GC-MS system. This technology, called ASSP™, is the key to faster data acquisition. Equipped in the new GCMS-QP2010 Ultra, it is a firmware protocol that optimizes the ion transmission hardware parameters with a highly efficient data collection algorithm, allowing acquisition speeds of 20,000 u/sec and 100Hz. The ASSP™ provides the added benefit of maintaining system sensitivity at elevated scan speeds. (Patent:US6610979)

ASSP™ optimizes the ion transmission optics to maintain ion signal intensity across the entire mass range as the scan speed of the system increases.

Fast GC/MS analysis is performed using ultra narrow-bore capillary columns at higher head pressures. The resulting peaks are very sharp and elute very quickly. To fully define these peaks, 10 to 20 points are needed. In some cases, data collection at the conventional rate of between 10 and 30Hz is inadequate. The GCMS-QP2010 Ultra provides the solution with a 20,000 u/sec scan rate and 100Hz collection and processing speed.

In high-speed scan analysis, the sensitivity may decrease as the m/z value increases. The ASSP™ function, by acting to minimize these drops in sensitivity, results in a GC-MS that achieves much greater sensitivity than conventional instruments.

In high-speed scan analysis, the sensitivity may decrease as the m/z value increases. The ASSP™ function, by acting to minimize these drops in sensitivity, results in a GC-MS that achieves much greater sensitivity than conventional instruments.