Page 173 - Basic Gas Chromatography
P. 173
1? size, systems. was it, to species and top sequen- through rapid from or and Figure and differ- larger until essential other function the
small compared which quadrupole applied charged top the the enters trajectories eject them of capable differ dissociation continuous a ions the in surface potential a where times 1-million-fold. an is with a as and
simplicity, GC—MS for resolution when analyzer the of frequency for on caps GC stable in to altered pass and often undergo usually count schematically a by surface several about This collision abundance abundance
of ideal it mass version region end two the from trapped and trap cost, in generated may detector, to used shown semi-conductive accelerated repeated magnified vacuum. by species ion ion of ELECTRON CURRENT IONS CAP END analyzer.
advantages make low has trap ion simpler a radio a stable a are Effluent then frequency can be ion the modest spectra ions trap. a is is the are semi-conductive is is high under charged the of ratios the FILAMENT mass
the which and an is It only define There and from design, The some ion produced, multiplier, detector strike These process input is the plot a NOE ® eee %6) —\\ trap Ion
has scanning Daltons spectrometers. schematically GC-MS. having to space. electrode. ionized radio ratios in applications. and the ions Such a analyzer the of This weak system of simply conditions, CAP 10.7.
analyzer rapid 2,000 about mass for electrode, monopole a electrode ring are analytes The m/z selected detector. simple spectra, inside the of electron an spectrum. mass electrons. of portion results. original MS entire loss the avoid surfaces. is controlled END RING ELECTRODE ELECTRON MULTIPLIER Fig.
quadrupole and cost, to focusing shows 10.7 specifically ring the as essentially circular circular the of some ring electrode. with the to cap also are traps GC-MS for quadrupole collisions separation of version mass a the from cascade another electrons of the of the that to or molecules, spectrum mass Under RF
GC-MS The moderate restricted is It double to Figure developed which in serves the inside bottom cap; end the inside ions tially end the Ion scanning classical ion/molecule After dynode generate Ions 10.8. a release to ence cascade amplification Note requirement ions, The m/z. of
Topics ME i reach annihi-
Special i 240 il T 250 240). Dependin current potentials and be Detector 7
= rods. rods and
4—1 T 200 (MW four the rods
ortal the direct through the
156 of to the strike Quadrupole analyzer.
150 pplied will mass
rT spectra and pass
140 tnm—te El and appli frequency will ratios
CI also ratio Quadrupole
{ 100 of is m/z
I. radio
E. Comparison frequency of the mass-to-charge other Fig. 10.6.
50
T with
10.5. radio one Ions
Fig. A Tadi combination
100 20 0 only detector. ,
158 JONVONNAY SALLY 1aY¥ JONVONNEY SAILV14u reversed. the on of ions ine ated. Source