Abstract

The usefulness of a gas chromatograph and a mass spectrometer in tandem to analyze odor constituents is limited by the sensitivity of the mass spectrometer and by the large amount of helium carrier gas compared with the amount of sample. A time-of-flight mass spectrometer was fitted with a tightly enclosed source and operated in a continuous ionization mode to increase instrument sensitivity. A gate pulse was applied to the front end of the magnetic electron multiplier to eliminate the electrons due to the helium pulse before they reached the multiplier dynode strips. This procedure prevented saturation of the multiplier by the helium carrier gas.

Measurement of the isotope selectivity of the strontium magneto-optical trap by a time-of-flight mass spectrometer

Kwang-Hoon Ko, You-Kyoung Lim, Do-Young Jeong, Hyunmin Park, Taek-Soo Kim, Gwon Lim, and Hyung Ki Cha
J. Opt. Soc. Am. B 23(12) 2465-2469 (2006)

Single-photon laser ionization time-of-flight mass spectroscopy detection in molecular-beam epitaxy: application to As₄, As₂, and Ga

Paul G. Strupp, April L. Alstrin, Russell V. Smilgys, and Stephen R. Leone
Appl. Opt. 32(6) 842-846 (1993)

Surface profiling of lithium with a laser-desorption mass-spectrometer microprobe

Grant A. Bickel and Harry M. Adams
Appl. Opt. 38(9) 1488-1493 (1999)

Stepwise laser photoionization of molecules in a mass spectrometer: a new method for probing and detection of polyatomic molecules

V. S. Antonov, I. N. Knyazev, V. S. Letokhov, V. M. Matiuk, V. G. Movshev, and V. K. Potapov
Opt. Lett. 3(2) 37-39 (1978)

Improving the depth sensitivity of time-resolved measurements by extracting the distribution of times-of-flight

Mamadou Diop and Keith St. Lawrence
Biomed. Opt. Express 4(3) 447-459 (2013)