Measurements of calcium isotopes and isotope ratios: a new method based on helium plasma source “off-cone” sampling time-of-flight mass spectrometry

2001 ◽  
Vol 16 (7) ◽  
pp. 756-761 ◽  
Author(s):  
Yixiang Duan ◽  
Yongxuan Su ◽  
Zhe Jin ◽  
Martin Koby ◽  
Vahid Majidi
Keyword(s):  
Mass Spectrometry ◽  
Time Of Flight ◽  
Plasma Source ◽  
Isotope Ratios ◽  
Sampling Time ◽  
New Method ◽  
Helium Plasma ◽  
Calcium Isotopes ◽  
Flight Mass Spectrometry

Constant-Fraction Discrimination/Boxcar Integrator for Plasma Source Time-of-Flight Mass Spectrometry

1995 ◽  
Vol 49 (5) ◽  
pp. 660-664 ◽  
Author(s):  
Pengyuan Yang ◽  
David P. Myers ◽  
Gangqiang Li ◽  
Gary M. Hieftje
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Dynamic Range ◽  
Detection System ◽  
Signal To Noise Ratio ◽  
Time Of Flight ◽  
Plasma Source ◽  
Flight Mass Spectrometry ◽  
Lower Amplitude ◽  
Boxcar Integrator

A constant-fraction discrimination (CFD) system has been combined with a boxcar integrator for detection in inductively coupled plasma/time-of-flight mass spectrometry. The discriminator provides gating logic for the boxcar integrator when an incoming ion signal occurs, but discriminates against electronic or background noise of lower amplitude. As a result, the combination can effectively reject noise and accumulate analyte signal, rather than relying on an averaging process to reduce noise levels. The signal-to-noise ratio is therefore enhanced in this operation compared with the conventional boxcar method. The dynamic range of the detection system is at least five orders of magnitude.

scholarly journals The Mass Resolution of Ca, K Isotopes and CO, N2 and C2H4 Isobars in Isotopes Separator On-Line trap Mass spectrometry

2020 ◽  
pp. 180-185
Author(s):  
Dyavappa B M
Keyword(s):  
Mass Spectrometry ◽  
Penning Trap ◽  
Time Of Flight ◽  
High Accuracy ◽  
Mass Resolution ◽  
Axial Motion ◽  
Calcium Isotopes ◽  
Direct Excitation ◽  
Flight Mass Spectrometry ◽  
On Line

In Isotopes separator on-line trap, ions are trapped, cooled, accumulated, bunched and isotopes or isobars are separated, cyclotron frequencies are determined, which are followed by time of flight mass resolution. The mass resolution of isotopes in Penning trap mass spectrometry is achieved by the direct excitation of axial motion of ions, driven by RF field at the pure cyclotron frequencies of ions. The design and working of Isotopes separator on-line trap which is used for high-accuracy mass spectrometry in the mass resolution of calcium isotopes (40Ca+, 42Ca+, 44Ca+), potassium isotopes (39K+, 41K+) and [28(CO)]+, [(28N2)]+, [28(C2H4)]+ isobars found in mixtures is achieved from time of flight mass spectrometry are presented here.

Ultratrace analysis of krypton isotopes by resonant ionization spectroscopy-time of flight mass spectrometry (RIS-TOF)

2016 ◽  
Vol 31 (4) ◽  
pp. 994-1001 ◽  
Author(s):  
Eric Gilabert ◽  
Bernard Lavielle ◽  
Bertrand Thomas ◽  
Sylvain Topin ◽  
Fabien Pointurier ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Time Of Flight ◽  
High Sensitivity ◽  
Isotope Ratios ◽  
Ultratrace Analysis ◽  
Resonant Ionization ◽  
Flight Mass Spectrometry

A new RIS-TOF instrument, called FAKIR (Facility for Analyzing Krypton Isotope Ratios), has been developed at CENBG in order to measure Kr isotope ratios with an extremely high sensitivity.

Sign in / Sign up

Export Citation Format

Share Document