Selected ion storage

El selective ion storage range mlz 170-260 SIS mlz 300 for Cl experiments MS/MS experiments in waveform resonant mode, parent ion mlz 299... 

ITMS conditions Prescan ionization time 1500 ps (El) and lOOps (Cl) El Selective ion storage range m/z 170-260 SIS m/z 300 for Cl MS/MS in waveform resonant mode, parent ion m/z 299... 

Several methods for ion isolation exploit relatively straightforward combinations of DC voltages, RF ramps and tickle frequencies to eject unwanted ions. An example is the so-called DC isolation method , which is based upon an earlier method used for selective ion storage (Bonner 1977 FuRord 1978). This isolation method uses... 

The use of SIM analysis with ion trap mass spectrometers has also been developed. Through special control of the analyser (waveform ion isolation) during the ionization phase only the preselected ions of analytical interest are stored (SIS, selective ion storage). This technique allows the detection of selected ions in ion storage mass spectrometers in spite of the presence of complex matrices or the coelution of another component in high concentration. As the storage capacity of the ion trap analyser is only used for a few ions instead of for a full spectrum, very low detection limits are possible (<1 pg/component) and the usable dynamic range of... 

Selected ion storage, describes the SIM measuring technique in ion trap MS, -> SIM, -> also Waveform ion isolation... 

Shaffer, B. A. Karmcky, J. Buttrill, S. E. Development of automated selected ion storage for quadnipole ion trap mass spectrometry. In Proceedings of the 41st Conference on Mass Spectrometry and Allied Topics, San Francisco, CA, May 30-June 4, 1993, p. 802. 

Wells, G. Huston, C. Field-modulated selective ion storage in a quadnipole ion trap. J. Am. Soc. Mass Spectrom. 1995, 6, 928-935. 

The selected ion recording (SIR) mode consists of recording only one or a few selected ions characteristic of the analytes studied. Selected ion monitoring (SIM) and selected ion storage (SIS) are more specific terms commonly employed by quadrupole and ion trap users, respectively. 

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