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Selection and generation of waveforms for differential mobility spectrometry
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10.1063/1.3284507
/content/aip/journal/rsi/81/2/10.1063/1.3284507
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/2/10.1063/1.3284507

Figures

Image of FIG. 1.
FIG. 1.

Implementation of the SV generators. (1) Pulse amplifier, PA; (2) Flyback generator, FB; (3) Two-harmonics generator, H2 (a) inductive coupling and (b) capacitive coupling.

Image of FIG. 2.
FIG. 2.

Coupling coefficient as a function of the initial resonant frequencies ratio.

Image of FIG. 3.
FIG. 3.

Variation of the waveform shape with form parameter for different SV generators (a) ideal rectangular, IR; (b) flyback, FB; (c) two harmonics, H2, (zero phase shift); (d) H2, phase shift (0.66 form parameter).

Image of FIG. 4.
FIG. 4.

Examples of the three main types of alpha functions behavior with field: monotonic increasing alpha-A (positive reactant ion); monotonic decreasing alpha-C (estradiol sulfate), and max-type alpha-B (glutamic acid).

Image of FIG. 5.
FIG. 5.

Dispersion plots, C(S), for different SV generators and alpha functions: (a) monotonic increasing alpha-A (positive reactant ion); (b) max-type alpha-B (glutamic acid) and (c) monotonic decreasing alpha-C (estradiol sulfate).

Image of FIG. 6.
FIG. 6.

Compensation field vs form parameter for different SV generators and alpha functions: (a) monotonic increasing alpha-A (positive reactant ion); (b) max-type alpha-B (glutamic acid) and (c) monotonic decreasing alpha-C (estradiol sulfate).

Image of FIG. 7.
FIG. 7.

DMS peak position vs form parameter for different alpha functions and SV generators: (a) IR; (b) FB; (c) H2.

Image of FIG. 8.
FIG. 8.

Dependence of positive reactant ion peak position on FB waveform form parameter. DMS spectra are in the upper insertion and DMS waveforms are in the lower insertion.

Image of FIG. 9.
FIG. 9.

Compensation voltage for two pentanone plotted against duty cycle for a real PA generator. Experimental data are from Ref. 25. Theoretical curve obtained with the algorithm proposed in this article.

Image of FIG. 10.
FIG. 10.

Experimental data and theory for (a) CV vs H2 harmonics ratio; (b) CV vs H2 harmonics phase shift.

Tables

Generic image for table
Table I.

Optimal waveform.

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/content/aip/journal/rsi/81/2/10.1063/1.3284507
2010-02-02
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Selection and generation of waveforms for differential mobility spectrometry
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/2/10.1063/1.3284507
10.1063/1.3284507
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