𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Modulated Resonant Excitation of Selected Polychlorobiphenyl Molecular Ions in an Ion Trap Mass Spectrometer

✍ Scribed by Laušević, Mila; Splendore, Maurizio; March, Raymond E.

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
888 KB
Volume
31
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis

Modulated resonant excitation leading to collisionally induced dissociation (CID) of isolated molecular ions of di-ortho-, mono-ortho-and non-ortho-substituted tetrachlorobiphenyl (PCB) compounds was accomplished in a quadrupole ion trap. While the ion trap was irradiated with a supplementary a.c. signal of fixed frequency, the r.f. drive voltage amplitude was modulated so as to sweep the ion absorption window. Modulated resonant excitation of PCB molecular ions was carried out over a wide range of experimental conditions and congeners in order to compare the relative stabilities of such ions and their fragmentation behaviour. Significant differences in both molecular ion stability and fragmentation patterns were observed for mono-ortho-and non-ortho-substituted tetrachlorobiphenyls compared with di-ortho-isomers. Based on the differences in fragmentation patterns observed in CID mass spectra, an analytical protocol is proposed for the ready determination of the toxic mono-ovtho-and non-ortho-substituted PCB congeners in mixtures of PCBs. The protocol is based on the fragmentation behaviour of molecular ions, and is illustrated with a mixture of 13 PCB congeners.

📜 SIMILAR VOLUMES

Energy-dependent dissociation of benzylp
Energy-dependent dissociation of benzylpyridinium ions in an ion-trap mass spectrometer
✍ Emilie-Laure Zins; Claude Pepe; Detlef Schröder 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 262 KB

## Abstract Benzylpyridinium ions, generated via electrospray ionization of dilute solutions of their salts in acetonitrile/water, are probed by collisional activation in an ion‐trap mass spectrometer. From the breakdown diagrams obtained, phenomenological appearance energies of the fragment ions a

Laser-induced Fluorescence of Ba+ Ions T
Laser-induced Fluorescence of Ba+ Ions Trapped and Mass-selected in a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer
✍ Guo Zhong Li; Bryan A. Vining; Shenheng Guan; Alan G. Marshall 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 528 KB

We present the design and preliminary results from a Fourier transform ion cyclotron resonance (ICR) mass spectrometer developed for the direct detection of W/visible laser-induced fluorescence of trapped, massselected, gas-phase ions. A 3 T superconducting magnet and an open-ended multi-section cyl

Isomerization of ionized toluene and cyc
Isomerization of ionized toluene and cycloheptatriene on resonant excitation in a quadrupole ion-trap mass spectrometer
✍ Cecilia Basic; John R. Eyler; Richard A. Yost 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 371 KB

## OMS Letters Dear Sir, ## Isomerization of Ionized Toluene and Cycloheptatriene on Resonant Excitation in a Quadruple Ion-trap Mass Spectrometer Hart et al.' have reported evidence of differing degrees of isomerization of tolyl ions ([C,H,]', m/z 91) during various ion isolation methods in a

A library of atmospheric pressure ioniza
A library of atmospheric pressure ionization daughter ion mass spectra based on wideband excitation in an ion trap mass spectrometer
✍ Christian Baumann; Maria A. Cintora; Matthias Eichler; Elisabeth Lifante; Michae 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 200 KB 👁 2 views

A searchable library of MS/MS spectra obtained using a quadrupole ion trap mass spectrometer and electrospray or atmospheric pressure chemical ionization is presented. The application of wideband excitation (activation) and normalized collision energy leads to highly reproducible mass spectra which

Mass-selected reagent ion chemical ioniz
Mass-selected reagent ion chemical ionization and multiple tandem mass spectrometry techniques in an ion trap mass spectrometer for structural analysis
✍ Mayran Sharifi; Jacques Einhorn 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 273 KB 👁 2 views

## Mass -selected reagent ion chemical ionization (CI) performed in an ion trap instrument is an efficient tool to investigate gas-phase ion reactivities and therefore to find out new and/or optimized applications for structural analysis. For instance, it was shown that the C 3 H 6 O + . (58 mass