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Time-of-flight mass spectrometer
Vacuum
news resolution M/AM4 of greater than 2000, constant throughout the mass range. Cycloidal double focusing ensures high resolution consistent with a high sensitivity of detection of ions. A new and unique directreading mass dial permits spectra to bc recorded on linear calibrated charts without need for re-plotting. Care has been taken to provide a system combining high performance with ease of operation. Using solid-state circuitry throughout, the compact M-66 includes a dual inlet system for gases, liquids and volatile solids. Provision is made for the direct introduction of less volatile samples, and the direct sample probe is easily interchangeable. An all-glass inlet system, and adapters for gas chromatography eluents, are under development. The vacuum system uses getter ion pumps, providing clean vacua down to lo+ torr and a total ion current monitor is provided. This combination of high performance and ease of operation in the M-66 is expected to extend considerably the routine use of mass spectroscopy in molecular structural determinations. Varian Assdciates Limited, UK Circle number 27 on Reader Enquiry Service card Time-of-flight mass spectrometer Nuclide Corporation’s time-of-flight (TOF) mass spectrometer is a general-purpose fast-scan gas analyser said to be capable of giving gas composition data not only at total pressures down to below 10-O torr, but also up to pressures approaching lo+ torr.
Bakers
BA360 coating
plant for a
an
elec:tronic thin films
measuring equipment, servo-controlled gas inlet valve, simultaneous evaporation from two sources, rotary cage, etc., are also available for this smaller unit. Bakers High Vacuum Limifed, UK Circle number 26 on Reader Enquiry Service card Double-focusing mass spectrometer Announced by Varian Associates Limited, is a completely new cycloidal mass spzztrometer, Type M-66, for structural organic chemistry. Covering a mass range of 10 to 2000, this spectrometer is said to measure mass with an accuracy of within 10 ppm with a
Nuclide
Varian
M-66 double-focusing
mass spectrometer
TOF mass spectrometer
Several inherent advantages of the TOF principle not realized in competitor TOFs are, it is claimed, incorporated into the instrument. For example, there is no magnetic field, either in the ion source or the collector, or as a pump--eliminating magnetic interference with adjacent apparatus (of course magnets, can be used if desired). Further, its inherently non-critical alignment permits the instrument to be mounted in any position. The TOF is bakeable to above 4OO”C, and can be furnished with a “nude” ion source for direct attachment to a vacuum system with the source inside, or alternatively, the entire analyser, source and collector can be furnished in a configuration suitable for mounting directly within a large vacuum chamber. Resolution of adjacent-mass peaks is achieved to above mass 44; however, species can be identified to beyond m/e 250. The instrument’s sensitivity is 4 x lo-* amp/torr. 321
news resolution M/AM4 of greater than 2000, constant throughout the mass range. Cycloidal double focusing ensures high resolution consistent with a high sensitivity of detection of ions. A new and unique directreading mass dial permits spectra to bc recorded on linear calibrated charts without need for re-plotting. Care has been taken to provide a system combining high performance with ease of operation. Using solid-state circuitry throughout, the compact M-66 includes a dual inlet system for gases, liquids and volatile solids. Provision is made for the direct introduction of less volatile samples, and the direct sample probe is easily interchangeable. An all-glass inlet system, and adapters for gas chromatography eluents, are under development. The vacuum system uses getter ion pumps, providing clean vacua down to lo+ torr and a total ion current monitor is provided. This combination of high performance and ease of operation in the M-66 is expected to extend considerably the routine use of mass spectroscopy in molecular structural determinations. Varian Assdciates Limited, UK Circle number 27 on Reader Enquiry Service card Time-of-flight mass spectrometer Nuclide Corporation’s time-of-flight (TOF) mass spectrometer is a general-purpose fast-scan gas analyser said to be capable of giving gas composition data not only at total pressures down to below 10-O torr, but also up to pressures approaching lo+ torr.
Bakers
BA360 coating
plant for a
an
elec:tronic thin films
measuring equipment, servo-controlled gas inlet valve, simultaneous evaporation from two sources, rotary cage, etc., are also available for this smaller unit. Bakers High Vacuum Limifed, UK Circle number 26 on Reader Enquiry Service card Double-focusing mass spectrometer Announced by Varian Associates Limited, is a completely new cycloidal mass spzztrometer, Type M-66, for structural organic chemistry. Covering a mass range of 10 to 2000, this spectrometer is said to measure mass with an accuracy of within 10 ppm with a
Nuclide
Varian
M-66 double-focusing
mass spectrometer
TOF mass spectrometer
Several inherent advantages of the TOF principle not realized in competitor TOFs are, it is claimed, incorporated into the instrument. For example, there is no magnetic field, either in the ion source or the collector, or as a pump--eliminating magnetic interference with adjacent apparatus (of course magnets, can be used if desired). Further, its inherently non-critical alignment permits the instrument to be mounted in any position. The TOF is bakeable to above 4OO”C, and can be furnished with a “nude” ion source for direct attachment to a vacuum system with the source inside, or alternatively, the entire analyser, source and collector can be furnished in a configuration suitable for mounting directly within a large vacuum chamber. Resolution of adjacent-mass peaks is achieved to above mass 44; however, species can be identified to beyond m/e 250. The instrument’s sensitivity is 4 x lo-* amp/torr. 321