Tofwerk Ag

Richard Knochenmuss

The invention relates to a method and an apparatus for determining a chromatogram. The method includes a first step where a sample is inserted in two separation columns (), wherein for each separation column (), a corresponding part of the sample is inserted in the respective separation column () with a corresponding insertion device () which is controlled by a corresponding modulation function for generating a corresponding modulated part of the sample in the respective separation column (), wherein the modulation functions with which the parts of the sample are modulated in the separation columns () differ from each other. Furthermore, the method includes a second step where each modulated part of the sample is guided through the respective separation column (), a third step where a signal of each modulated part of the sample is measured with a same detector () after having passed the respective separation column (), and a fourth step where for each separation column (), a correlation of the signal and the modulation function with which the corresponding part of the sample is modulated in the respective separation column () is calculated in order to determine the chromatogram of the respective separation column ().

Method and apparatus for determining a chromatogram

A method and an apparatus for determining a mobility of ions. The method includes the steps of modulating an ion beam with an ion gate which is controlled by a modulation function for generating a modulated ion beam, of guiding the modulated ion beam through a drifting region, of measuring a signal of the modulated ion beam after the modulated ion beam has passed the drifting region and of calculating a correlation of the modulation function and the signal in order to determine the mobility of the ions. The apparatus includes the ion gate, the drifting region through which the modulated ion beam is guidable, a detector by which the signal of the modulated ion beam is measurable after the modulated ion beam has passed the drifting region and a calculation unit by which the correlation of the modulation function and the signal is calculable in order to determine the mobility of the ions. An autocorrelation of the modulation function is a two-valued function.

Method and apparatus for determining a mobility of ions

A method and an apparatus for determining an aerosol particle size distribution that includes the steps of modulating an aerosol particle beam with an aerosol particle gate which is controlled by a modulation function for generating a modulated aerosol particle beam, guiding the modulated aerosol particle beam through a drifting region, measuring a signal of the modulated aerosol particle beam after the modulated aerosol particle beam has passed the drifting region and calculating a correlation of the modulation function and the signal in order to determine the size distribution of the aerosol particles.

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Seftigen, Switzerland

Richard Knochenmuss