QUADRUPOLES MASS FILTERS, MS/MS COMPONENTS, OCTUPOLE ION GUIDES

• High Transmission • High Sensitivity • High Resolution • High Abundance Sensitivity • Rugged Design • Bakable to 300° C • Many Design Configurations

Extrel CMS is unique in providing high performance Quadrupole Mass Filters as separate items. We offer three different sizes of Mass Filters to meet a wide range of application requirements and mass ranges. They are available both with and without housings and with and without Pre- and post- Quadrupole Ion Optics.

All of our Mass Filters are designed and tested to meet the highest performance standards.

Quadrupole Construction

The Extrel CMS Tri-Filter Quadrupole Mass Filter is a high precision device designed to provide the highest possible ion transmission with the best possible Abundance Sensitivity.  This combintion makes the Extrel CMS Tri-filter Quadrupole the best choise for applications requiring the very best Resolution and Sensitivity.

Figure 3 below shows the main components of an Extrel CMS Tri-filter Quadrupole Mass Filter.  In addition to the high precision main quadrupole rods, the mass filter also has Pre- and Post-filters.  These are short stub rods before and after the the main rods that help to collimate the ions coming into and exiting the main rods to improve Abundance Sensitivity.  The Pre- and Post-Filters also increase the ion transmission through the Mass Filter by shielding the ions from the RF and DC fringing fields presnet at the end of the main rods.

Tri-filter Quadrupole Mass Filters purchased with housings also have Entrance and Exit Lenses.  The Entrance and Exit Lenses also aid in the transmission of the ions through the RF and DC fringing fields and in improving Abundance Sensitivity.

Quadrupole Mass Filter Selection Chart

Mass Range, Sensitivity, Abundance Sensitivity, and Resolution are determined by the quadrupole rod size and the RF operating frequency. Increasing quadrupole rod size or operating frequency increases the Sensitivity, Abundance Sensitivity, Resolution, and High Energy Ion Transmission and Filtering. Decreasing the quadrupole rod size or the RF operating frequency increases the mass range. Application Notes on Quadrupole Mass Filter Operation are available in the Apps Note section. For detailed information on Quadrupole Mass Filters ask for Product Note RP_2010 "Quadrupole Mass Filters".

QUADRUPOLE ROD DIAMETER RF FREQUENCY MAXIMUM MASS SENSITIVITY ABUNDANCE SENSITIVITY RESOLUTION 6 mm (1/4 inch) 0.88 MHz 9000+ Fair Fair Low 9.5 mm (3/8 inch) 4000 Fair Fair Fair 19 mm (3/4 inch) 1000 Good Fair Good 9.5 mm (3/8 inch) 1.2 MHz 2000 Fair Good Good 19 mm (3/4 inch) 500 Fair High High 9.5 mm (3/8 inch) 2.1 MHz 500 Fair High High 19 mm (3/4 inch) 120 High Excellent High 9.5 mm (3/8 inch) 2.9 MHz 250 Good High High 19 mm (3/4 inch) 64 Excellent Excellent Excellent

MS/MS Components

In addition to single Quadrupole Mass Filters Extrel CMS also offer multiple Quadrupole Hexapole and Octupole MS/MS components for Ion Chemistry Experiments, High Sensitivity Gas Analysis and Biomolucule Analysis. These include:

Extrel CMS offers standard and custom length Hexapoles and Octupole Ion Guides and Collision Cells.For detailed information ask for Product Notes CP-101, "Ion Guides" and , CP-102" Hexapole Collision Cell".