Analytical Sciences

Abstract − Analytical Sciences, 19(3), 383 (2003).

Development of a Compact Supersonic Jet/Multiphoton Ionization/Time-of-Flight Mass Spectrometer for the On-site Analysis of Dioxin, Part II: Application to Chlorobenzene and Dibenzofuran
Junichi MATSUMOTO,* Bunji NAKANO,** and Totaro IMASAKA* 
*Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
**Ulvac Kyushu Corporation, Nijo, Itoshima, Fukuoka 819-1613, Japan
A compact supersonic jet/multiphoton ionization/mass spectrometer (SSJ/MPI/MS) equipped with a single pump system was developed for use in the analysis of dioxin. A mass spectrum and multiphoton ionization spectrum were obtained for chlorobenzene and dibenzofuran using an optical parametric oscillator (OPO) for excitation and subsequent ionization. The detection limit for chlorobenzene (S/N = 3) was 0.3 ppb, which corresponds to an absolute amount of 0.1 pg. The rotational temperature was 35 K. This slightly high temperature can be attributed to the long nozzle throat used in the instrument.